Antenatal Cardiotocography: Methods, interpretation and clinical application

References

• Abelson D., Balin H. Analysis of the Doppler signals from the fetal heart. Am J Obstet Gynecol 1972; 112: 796
   Google Scholar
• Acién P., Salvatierra V., Navarrete L. Fetal heart rate deceleration index—its relation with fetal pH, Apgar score and dips or decelerations. J Perinat Med 1979; 7: 7
   Google Scholar
• Ahlfeld F. Wrisberg, Mayor, de Kergaradec. Zur Geschichte und Entwicklung der Geburtshülflichen Auskultation. Monatschr Geburtshülfe Gynåkol 1921; XLVII: 187
   Google Scholar
• Aladjem S. Effects of spontaneous and artificial membrane rupture in labour upon fetal heart rate. Br J Obstet Gynaecol 1977; 84: 44
   Google Scholar
• Barrada M. I., Edwards L. E., Håkanson E. Y. Antepartum fetal testing. I. The oxytocin challenge test. Am J Obstet Gynecol 1979; 134: 532
   Google Scholar
• Barrada M. I., Edwards L. E., Håkanson E. Y. Antepartum fetal testing. II. The acceleration/constant ratio: A nonstress test. Am J Obstet Gynecol 1979; 134: 538
   Google Scholar
• Baskett T. F., Koh K. S. Sinusoidal fetal heart pattern. A sign of fetal hypoxia. Obstet Gynecol 1974; 44: 379
   Google Scholar
• Baskett T. F., Sandy E. False negative oxytocin challenge tests. Am J Obstet Gynecol 1975; 123: 106
   Google Scholar
• Baskett T. F., Sandy E. A. The oxytocin challenge test. An ominous pattern associated with severe fetal growth retardation. Obstet Gynecol 1979; 54: 365
   Google Scholar
• Beard R. W., Brundenell J. M., Feroze R. M. Intensive care of the high risk fetus in labour. J Obstet Gynaecol Br Commonw 1971; 78: 882
   Google Scholar
• van Bemmel J. H., van der Weide H. Detection procedure to represent the foetal heart rate and electrocardiogram. IEEE Trans Biomed Eng 1966; 13: 175
   PubMedGoogle Scholar
• Benatt A. Über Herztonschreibung. Zugleich ein Beitrag zur Frage der Embryokardie. Klin Wochenschr 1928; 7: 752
   Google Scholar
• Berg D. Die Beurteilung der fetalen Schlag-zu-Schlag-Herz-Frequenz—Theoretisch experimentelle und klinische Gesichtspunkte. Perinatale Medizin 11. Georg Thieme Verlag, Stuttgart 1979; 213
   Google Scholar
• Berger C., Baumann U., Ramzin M., Richter R. Wertigkeit des transabdominal registrierten fetalen Elektrokardiogramms für die Kardiotokographie. Z Geburtshilfe Perinatol 1978; 182: 278
   Google Scholar
• Bernstein P., Mann H. A clinical evaluation of fetal electrocardiography. A study of 100 cases by a new technique and an improved instrument. Am J Obstet Gynecol 1942; 43: 21
   Google Scholar
• Beruti J. A. Fernauskultation und Registrierung der fetalen Herztbne. Arch Gynaekol 1927; 232: 52
   Google Scholar
• Bhakthavathsalan A., Mann L. I., Tejani N. A., Weiss R. R. Correlation of the oxytocin challenge test with perinatal outcome. Obstet Gynecol 1976; 48: 552
   Google Scholar
• Bishop E. H. The Doppler ultrasonic motion sensor. Obstet Gynecol 1966; 28: 712
   Google Scholar
• Bishop E. H. Obstetric uses of the ultrasonic motion sensor. Am J Obstet Gynecol 1966; 96: 863
   PubMed Web of Science ®Google Scholar
• Bishop E. H. Ultrasonic fetal monitoring. Clin Obstet Gynecol 1968; 11: 1154
   PubMedGoogle Scholar
• Blondheim S. H. The technique of fetal electrocardiography. Am Heart J 1947; 33: 35
   Google Scholar
• Blundell J. Vorlesungen über Geburtshilfe. Mit Anmerkungen und Erklärungen von Thomas Castle. Leipzig 1836
   Google Scholar
• Bobitt J. R. Fetus, placenta and newborn. Abnormal antepartum fetal heart rate tracings, failure to intervene, and fetal death: Review of five cases reveals potential pitfalls of antepartum monitoring programs. Am J Obstet Gynecol 1979; 133: 415
   Google Scholar
• Bolte A., Bachmann K. D., Kühn G. Die fetalen Herzaktionspotentiale und ihre diagnostische Bedeutung. Ein Beitrag zur pränatalen Reifebestimmung mit Hilfe der fetalen Elektrokardiographie. Arch Gynäkol 1966; 203: 133
   Google Scholar
• Bolte A. Die pränatale fetale Elektrokardiographie. Gynäkologe 1969; 2(2)63
   Google Scholar
• Borell U., Fernström I., Ohlsson L., Wiqvist N. Influence of uterine contractions on the uteroplacental blood flow at term. Am J Obstet Gynecol 1965; 93: 44
   Google Scholar
• Braly P., Freeman R. K. The significance of fetal heart rate reactivity with a positive oxytocin challenge test. Obstet Gynecol 1977; 50: 689
   PubMed Web of Science ®Google Scholar
• Breuker K. H., Bolte A., Tan H. S. Clinical value of prenatal cardiotocography. Perinatal Medicine, Z. K. Stembera, K. Polacek, V. Sabata. Georg Thieme Verlag, Stuttgart 1974
   Google Scholar
• Breuker K. H., Khalili-Brunklaus D., Bolte A. Das abdominale fetale EKG zur prä- und subpartualen Herzfrequenzanalyse. Arch Gynäkol 1976; 221: 211
   Google Scholar
• Brotanek S. The pathogenesis and significance of saltatory patterns in the fetal heart rate. Int J Gynaecol Obstet 1973; 11: 6
   Google Scholar
• Bumm E. Grundriss zum Studium der Geburtshülfe. J. F. Bergman Verlag, Wiesbaden 1902
   Google Scholar
• Caldeyro-Barcia R., Mèndez-Bauer C., Poseiro J. J., Escarcena L. A., Pose S. V., Bieniarz J., Arnt I., Gulin L., Althabe O. Control of human fetal heart rate during labor. The Heart and Circulation in the Newborn and Infant, D. E. Cassels, New York 1966
   Google Scholar
• Callagan D. A., Rowland T. C., Goldman D. E. Ultrasonic Doppler observation of the fetal heart. Obstet Gynecol 1964; 23: 637
   Google Scholar
• Cetrulo C. L., Schifrin B. S. Fetal heart rate patterns preceding death in utero. Obstet Gynecol 1976; 48: 521
   Google Scholar
• Chan W. H., Paul R. H., Toews J. Intrapartum fetal monitoring. Maternal and fetal morbidity and perinatal mortality. Obstet Gynecol 1973; 41: 7
   PubMed Web of Science ®Google Scholar
• Chik L., Sokol R. J., Rosen M. G. “Prediction” of the one-minute Apgar score from fetal heart rate data. Obstet Gynecol 1976; 48: 452
   PubMedGoogle Scholar
• Christie G. B., Cudmore D. W. The oxytocin challenge test. Am J Obstet Gynecol 1974; 118: 327
   Google Scholar
• Cibils L. A. Clinical significance of fetal heart rate patterns during labor. I. Baseline patterns. Am J Obstet Gynecol 1976; 125: 290
   PubMed Web of Science ®Google Scholar
• Cooper J. M., Soffronoff E. C., Bolognese R. J. Oxytocin challenge test in monitoring high-risk pregnancies. Obstet Gynecol 1975; 45: 27
   PubMedGoogle Scholar
• Cremer M. Ueber die direkte Ableitung der Aktions-ströme des menschlichen Herzens vom Oesophagus und über das Elektrokardiogramm des Fötus. Munch Med Wochenschr 1906; 53: 811
   Google Scholar
• Detwiler J. S., Jarisch W., Caritis S. N. Statistical fluctuations in heart rate variability indices. Am J Obstet Gynecol 1980; 136: 243
   PubMed Web of Science ®Google Scholar
• Egley C. C., Suzuki K. Intrauterine fetal demise after negative oxytocin challenge tests. Obstet Gynecol Suppl 1977; 50: 54
   Google Scholar
• Eisenberg de Smoler P., Smith H. C., Sanchez A. G., Karchmer S. Electrocardiographie foetale externe. Importance de la preparation de la peau maternelle, et autres sources d'erreurs (1). J Gynecol Obstet Biol Reprod (Paris) 1973; 2: 837
   Google Scholar
• Emmen L., Huisjes H. J., Aarnoudse J. G., Visser G. H. A. Antepartum diagnosis of the “terminal” fetal state by cardiotocography. Br J Obstet Gynaecol 1975; 82: 353
   Google Scholar
• Escarcena L., McKinney R. D., Depp R. Fetal baseline heart rate variability estimation. I. Comparison of clinical and stochastic quantification techniques. Am J Obstet Gynecol 1979; 135: 615
   Google Scholar
• Evertson L. R., Gauthier R. J., Collea J. V. Fetal demise following negative contraction stress tests. Obstet Gynecol 1978; 51: 671
   Google Scholar
• Evertson L. R., Gauthier R. J., Schifrin B. S., Paul R. H. Antepartum fetal heart rate testing. I. Evolution of the nonstress test. Am J Obstet Gynecol 1979; 133: 29
   PubMedGoogle Scholar
• Ewing D. E., Farina J. R., Otterson W. N. Clinical application of the oxytocin challenge test. Obstet Gynecol 1974; 43: 563
   Google Scholar
• Farahani G., Fenton A. N. Fetal heart rate acceleration in relation to the oxytocin challenge test. Obstet Gynecol 1977; 49: 163
   Google Scholar
• Fischer W. M., Helmke K. Selektiereinrichtung zur getrennten Registrierung der fetalen und maternalen Herzfrequenz aus dem abdominalen Elektrokardiogramm. Z Geburtshilfe Perinatol 1972; 176: 343
   Google Scholar
• Fischer W. M., Stude I., Brandt H. Ein Vorschlag zur Beurteilung des antepartualen Kardiotokogramms. Z Geburtshilfe Perinatol 1976; 180: 117
   Google Scholar
• Flynn A. M., Kelly J. Evaluation of fetal well-being by antepartum fetal heart monitoring. Br Med J 1977; i: 936
   Google Scholar
• Flynn A. M., Kelly J., O'Conor M. Unstressed antepartum cardiotocography in the management of the fetus suspected of growth retardation. Br J Obstet Gynaecol 1979; 86: 106
   PubMedGoogle Scholar
• Foa. L'élektrokard. foetal. Arch Ital Biol 1911; 56: 145
   Google Scholar
• Fox H. E., Steinbrecher M., Ripton B. Antepartum fetal heart rate and uterine activity studies. I. Preliminary report of accelerations and the oxytocin challenge test. Am J Obstet Gynecol 1976; 126: 61
   Google Scholar
• Freeman R. K. The use of the oxytocin challenge test for antepartum clinical evaluation of uteroplacental respiratory function. Am J Obstet Gynecol 1975; 121: 481
   PubMed Web of Science ®Google Scholar
• Freeman R. K., James J. Clinical experience with the oxytocin challenge test. II. An ominous atypical pattern. Obstet Gynecol 1975; 46: 255
   Google Scholar
• Freeman R. K., Goebelsman U., Nochimson D., Cetrulo C. An evaluation of the significance of a positive oxytocin challenge test. Obstet Gynecol 1976; 47: 8
   Google Scholar
• Frey E. Neue Untersuchungen über das Verhalten der kindlichen Herztöne sub partu. Z Geburtshilfe Gynaekol 1925; 88: 261
   Google Scholar
• Gal D., Neuhoff S., Lilling M. I., Tancer M. L. False negative oxytocin challenge test: Report of three cases. Am J Obstet Gynecol 1979; 133: 111
   Google Scholar
• Garite T. J., Freeman R. K., Hochleutner I., Linzey E. M. Oxytocin challenge test. Achieving the desired goals. Obstet Gynecol 1978; 51: 614
   Google Scholar
• Gauthier R. J., Evertson L. R., Paul R. H. Ante-partum fetal heart rate testing. II. Intrapartum fetal heart rate observation and newborn outcome following a positive contraction stress test. Am J Obstet Gynecol 1979; 133: 34
   Google Scholar
• Gaziano E. P., Hill D. L., Freeman D. W. The oxytocin challenge test in the management of high-risk pregnancies. Am J Obstet Gynecol 1975; 121: 947
   Google Scholar
• Gaziano E. P., Freeman D. W. Analysis of heart rate patterns preceding fetal death. Obstet Gynecol 1977; 50: 578
   PubMed Web of Science ®Google Scholar
• Gaziano E. P. A study of variable decelerations in association with other heart rate patterns during monitored labor. Am J Obstet Gynecol 1979; 135: 360
   PubMedGoogle Scholar
• Gibbons J. M., Nagle P. Correlation of nonstressed fetal heart rate with sequential contraction stress test. Obstet Gynecol 1980; 55: 612
   Google Scholar
• Goldkrand J. W., Speichinger J. P. “Mixed cord compression”, fetal heart rate pattern, and its relation to abnormal cord position. J Obstet Gynecol 1975; 122: 144
   Google Scholar
• Goodlin R. C., Girard J., Hollmen A. Systolic time intervals in the fetus and neonate. Obstet Gynecol 1972; 39: 295
   PubMed Web of Science ®Google Scholar
• Goodlin R. C., Lowe E. W. A functional umbilical cord occlusion heart rate pattern. The significance of overshoot. Obstet Gynecol 1974; 43: 22
   Google Scholar
• Goodlin R. C. Fetal cardiovascular responses to distress. A review. Obstet Gynecol 1977; 49: 371
   Google Scholar
• Goodlin R. C., Haesslein H. C. When is it fetal distress?. Am J Obstet Gynecol 1977; 128: 440
   Google Scholar
• Goodlin R. C. History of fetal monitoring. Am J Obstet Gynecol 1979; 133: 323
   PubMed Web of Science ®Google Scholar
• Gültekin-Zootzmann B. The history of monitoring the human fetus. J Perinat Med 1975; 3: 135
   Google Scholar
• de Haan J., van Bemmel J. H., Versteeg B., Veth A. F. L., Stoke L. A. M., Janssens J., Eskes T. K. A. B. Quantitative evaluation of fetal heart rate patterns. I. Processing methods. Eur J Obstet Gynecol 1971; 3: 95
   Google Scholar
• de Haan J., Martin C. B., Evers J. L. H., Jongsmaa H. W. Pathophysiologic mechanisms underlying fetal heart rate patterns. Perinatal Medicine, O. Thalhammer, K. Baumgarten, A. Pollak. Georg Thieme Verlag, Stuttgart 1979; 200
   Google Scholar
• Hajeri H., Papiernik E. Fetal heart rate monitoring during delivery of the small-for-date fetus. Contr Gynecol Obstet 1977; 3: 41
   Google Scholar
• Hammacher K. Neue Metode zur selektiven Registrierung der fetalen Herzschlagfrequenz. Geburtshilfe Frauenheilkd 1962; 22: 1542
   Google Scholar
• Hammacher K. Fetale Herzschlagfrequenz und intrauterine Hypoxie. Arch Gynäkol 1965; 202: 353
   Google Scholar
• Hammacher K. Früherkennung intrauteriner Gefahrenzustände durch Elektrophonokardiographie und Tokographie. Die Prophylaxe frühkindlicher Hirnschäden, R. Elert, K. A. Hüter. Georg Thieme Verlag, Stuttgart 1966
   Google Scholar
• Hammacher K. Die kontinuerliche elektronische Überwachung der fetalen Herztätigkeit vor und während der Geburt. Gynäkologi und Geburtshilfe II, O. Käser, V. Fredberg, K. G. Ober, K. Thomsen, Z. Zander. Georg Thieme Verlag, Stuttgart 1967; 793
   Google Scholar
• Hammacher K. Elektronische Kontrolle des fetalen Lebens vor und während der Geburt. Arch Gynaekol 1967; 204: 270
   Google Scholar
• Hammacher K., Hüter K. A., Bokelmann J., Werners P. H. Foetal heart frequency and perinatal condition of the foetus and newborn. Gynaecologia 1968; 166: 349
   Google Scholar
• Hammacher K., Werners P. H. Über die Auswertung und Dokumentation von CTG-Ergebnissen. Gynaecologia 1968; 166: 410
   PubMedGoogle Scholar
• Hammacher K. Elektronische Geburtsüberwachung. Med Klin 1969; 64: 1846
   Google Scholar
• Hammacher K., Brun del Re R., Gaudenz R., De-Grandi P., Richter R. Kardiotokographischer Nachweis einer fetalen Gefährdung mit einem CTG-Score. Gynäkol Rundsch Suppl 1974; 1: 61
   Google Scholar
• Hayden B. L., Leigh Simpson J., Ewing D. E., Otterson W. N. Can the oxytocin challenge test serve as the primary method for managing high-risk pregnancies?. Obstet Gynecol 1975; 46: 251
   Google Scholar
• Henderson Powell O., Melville A., MacKenna J. Fetal heart rate acceleration in labor: Excellent prognostic indicator. Am J Obstet Gynecol 1979; 134: 36
   Google Scholar
• Hess O. W., Hon E. H. The electronic evaluation of fetal heart rate. 111. The effect of an oxytocic agent used for the induction of labor. Am J Obstet Gynecol 1960; 80: 558
   Google Scholar
• Hobbins J. C., Freeman R., Queenan J. T. The fetal monitoring debate. Obstet Gynecol 1979; 54: 103
   PubMed Web of Science ®Google Scholar
• von Hoefft H. Beobachtungen uber Auskultation der Schwangeren, welche während den Jahren 1835 und 1836 in der Keiserlichen Gebäranstalt zu St. Petersburg gesammelt sind. Neue Zeitschrift für Geburtskunde 1838; VI: 1
   Google Scholar
• Hofbauer J., Weiss O. Photographische Registrierung der fötalen Herztöne. Zentralbl Gynaecol 1908; 13: 429
   Google Scholar
• Hohl A. F. Die Geburtshilfliche Exploration. Theil I. Halle. 1833, 34
   Google Scholar
• Hohl A. F. Lehrbuch der Geburtshülfe mit Einschluss der Geburtshülflichen Operationen und der gerichtlichen Geburtshülfe. Wilhelm Engelmann Verlag, Leipzig 1855
   Google Scholar
• Hon E. H., Hess O. W. Insturmentation of fetal electrocardiography. Science 1957; 125: 553
   PubMed Web of Science ®Google Scholar
• Hon E. H. The electronic evaluation of the fetal heart rate. Preliminary report. Am J Obstet Gynecol 1958; 75: 1215
   PubMed Web of Science ®Google Scholar
• Hon E. H. Observations on “pathologic” fetal brady-cardia. Am J Obstet Gynecol 1959; 77: 1084
   PubMed Web of Science ®Google Scholar
• Hon E. H. The fetal heart rate patterns preceding death in utero. Am J Obstet Gynecol 1959; 78: 47
   Google Scholar
• Hon E. H., Wohlgemuth R. The electronic evaluation of fetal heart rate. IV. The effect of maternal exercise. Am J Obstet Gynecol 1961; 81: 361
   PubMed Web of Science ®Google Scholar
• Hon E. H. Electronic evaluation of the fetal heart rate. VI. Fetal distress—a working hypothesis. Am J Obstet Gynecol 1962; 83: 333
   Google Scholar
• Hon E. H. Instrumentation of fetal heart rate and fetal electrocardiography. II. A vaginal electrode. Am J Obstet Gynecol 1963; 86: 772
   Google Scholar
• Hon E. H., Lee S. T. Noise reduction in fetal electrocardiography. II. Averaging techniques. Am J Obstet Gynecol 1963; 87: 1086
   PubMed Web of Science ®Google Scholar
• Hon E. H. The classification of fetal heart rate. I. A working classification. Obstet Gynecol 1963; 22: 137
   PubMedGoogle Scholar
• Hon E. H., Lee S. T. Electronic evaluation of the fetal heart rate. VIII. Patterns preceding fetal death, further observation. Am J Obstet Gynecol 1963; 87: 814
   PubMed Web of Science ®Google Scholar
• Hon E. H. The human fetal circulation in normal labor. The Heart and Circulation in the Newborn and Infant, D. E. Cassels, New York 1966; 37
   Google Scholar
• Hon E. H., Quilligan E. J. Classification of fetal heart rate. II. A revised working classification. Conn Med 1967; 33: 779
   Google Scholar
• Hon E. H. The present status of electronic monitoring of the human fetal heart. Int J Gynaecol Obstet 1972; 10: 191
   Google Scholar
• Hon E. H. Severe variable decelerations in fetal heart rate. CMA J 1976; 115: 491
   Google Scholar
• Hon E. H. Instrumentation of fetal heart rate and fetal electrocardiography. III. Fetal ECG electrodes: Further observations. Obstet Gynecol 1967; 30: 281
   Google Scholar
• Hon E. H., Yeh S. Y. Electronic evaluation of fetal heart rate. X. The fetal arrhythmia index. Med Res Eng Oct-Nov, 1969; 14
   Google Scholar
• Hon E. H. Biophysical intrapartal fetal monitoring. Clin Perinatol 1974; 1: 149
   PubMedGoogle Scholar
• Hon E. H., Petrie R. H. Clinical value of fetal heart rate monitoring. Clin Obstet Gynecol 1975; 18: 1
   PubMedGoogle Scholar
• Hon E. H. Fetal heart rate monitoring for evaluation of fetal well-being. Postgrad Med 1977; 61: 139
   PubMed Web of Science ®Google Scholar
• Huber R. Die Entwicklung der klinischen Wehenregistrierung; Angabe eines eigenen Wehenschreibers. 2 Geburtshilfe Gynäkol 1955; 144: 75
   Google Scholar
• Huddleston J. F., Sutliff G., Carney F. E., Flowers C. E. Oxytocin challenge test for antepartum fetal assessment. Report of a clinical experience. Am J Obstet Gynecol 1979; 135: 609
   Google Scholar
• Huey J. R., Paul R. H., Al Hadjiev A., Jilek J., Hon E. H. Fetal heart rate variability: An approach to automated assessment. Am J Obstet Gynecol 1979; 134: 691
   PubMed Web of Science ®Google Scholar
• Hürthle K. Ueber die Erklärung des Cardiogramms mit Hülfe der Herztonmarkierung und über eine Methode zur mechanischen Registrierung der Töne. Dtsch Med Wochenschr 1893; 77
   Google Scholar
• Hüter V. Ueber den Fötalpuls. Monatz Geburtskunde Frauenkrankheiten 1862; XVIII, Suppl, Berlin
   Google Scholar
• Ingemarsson I., Raabe N., Solum T. Fetal monitoring by abdominal ECG. Läkartidningen 1976; 73: 4526
   Google Scholar
• Ingemarsson I. Terbutaline in obstetrics. Acta Pharmacol Toxicol 1979; II: 84
   Google Scholar
• Ingemarsson E., Ingemarsson I., Solum T., Westgren M. A one-year study of routine fetal heart rate monitoring during the first stage of labor. Acta Obstet Gynecol Scand 1980; 59: 297
   Web of Science ®Google Scholar
• James L. S., Morishima H. O., Daniel S. S., Bowe E. T., Cohen H., Niemann W. H. Mechanism of late deceleration of the fetal heart rate. Am J Obstet Gynecol 1972; 113: 578
   Google Scholar
• James L. S., Yeh M. N., Morishima H. O., Daniel S. S., Caritis S. N., Niemann W. H., Indyk L. Umbilical vein occlusion and transient acceleration of the fetal heart rate. Experimental observations in subhuman primates. Am J Obstet Gynecol 1976; 126: 276
   PubMed Web of Science ®Google Scholar
• Jauer P. C., Heinrich J., Koepcke E., Hopp H., Seidenschnur G. Vergleichende Untersuchungen zur Frage der Wertigkeit der Impulsaufnahmeverfahren der vorgeburtlichen Kardiotokographie. Zentralbl Gynaekol 1976; 98: 990
   Google Scholar
• Johnson W. L., Stegall H. F., Lein J. N., Rushmer R. F. Detection of fetal life in early pregnancy with an ultrasonic Doppler flowmeter. Obstet Gynecol 1965; 26: 305
   Google Scholar
• Junge H. D. Eine neue Technik der elektronischen Dauerüberwachung von fetaler Herzfrequenz und Wehentätigkeit unter der Geburt. Geburtshilfe Frauenheilkd 1969; 29: 129
   Google Scholar
• Junge H. D. Behavioral states and state related heart rate and motor activity patterns in the newborn infant and the fetus ante partum. A comparative study. II. Computer analysis of state related heart rate baseline and macrofluctuation patterns. J Perinat Med 1979; 7: 134
   PubMed Web of Science ®Google Scholar
• Kariniemi V. Quantification of fetal heart rate variability by electro- and magnetocardiography. Academic Dissertation, Helsinki 1978
   Google Scholar
• Kariniemi V. Evaluation of fetal heart rate variability by a visualsemiquantitative method and by a quantitative statistical method with the use of a minicomputer. Am J Obstet Gynecol 1978; 130: 588
   Google Scholar
• Kariniemi V., Hukkinen K., Katila T., Laine H. Quantification of fetal heart rate variability by abdominal electrocardiography. J Perinat Med 1979; 7: 27
   Google Scholar
• Katz J. Der Fötalpuls und sein Verhältniss zur operativen Geburtshilfe. Inauguraldissertation, Marburg 1865
   Google Scholar
• Katz M., Wilson S. J., Young B. K. Sinusoidal fetal heart rate. II. Continuous tissue pH studies. Am J Obstet Gynecol 1980; 136: 594
   Google Scholar
• Keegan K. A., Paul R. H., Broussard P. M., McCart D., Smith M. A. Antepartum fetal heart rate testing. III. The effect of phenobarbital on the nonstress test. Am J Obstet Gynecol 1979; 133: 579
   Google Scholar
• Keegan K. A., Paul R. H. Antepartum fetal heart rate testing. IV. The nonstress test as a primary approach. Am J Obstet Gynecol 1980; 136: 75
   PubMedGoogle Scholar
• Keegan K. A., Paul R. H., Broussard P. M., McCart D., Smith M. A. Antepartum fetal heart rate testing. V. The nonstress test—an outpatient approach. Am J Obstet Gynecol 1980; 136: 81
   Google Scholar
• Kennedy E. Observations on obstetrical auscultation. Dublin 1833
   Google Scholar
• Khalili-Araghi-Brunklaus D. Das abdominale fetale EKG zur prä- und subpartualen Herzfrequenzanalyse. Inaugural-Dissertation, Köln 1976
   Google Scholar
• Klapholz H., Miller F. C., Skiba H. Systolic time intervals in the nonasphyxiated fetus. Obstet Gynecol 1980; 55: 79
   Google Scholar
• Kleinhout J., Stolte L. A. M., Janssens J., Knoop A. A. The fetal autonomic nervous system, the fetal heart rate and the beat-to-beat irregularity. Eur J Obstet Gynecol Reprod Biol 1977; 7/6: 373
   Google Scholar
• Klöck F. K., Jung H. Die kontinuerliche Registrierung der fetalen Herzfrequenz mittels der elektrischen Impulsabnahme. Geburtshilfe Frauenheilkd 1969; 29: 617
   Google Scholar
• Klöck F. K., Lamberti G., Schulte H. J., Liedtke B. Die Kardiotokographie mit dem externen fetalen EKG. Deutscher Kongress für perinatale Medizin, Berlin 4–6 nov., 1971
   Google Scholar
• Klöck F. K., Lamberti G., Schulte H. J., Liedtke B. Die externe fetale Elektrokardiotokographie. Z Geburtshilfe Perinatol 1972; 176: 81
   Google Scholar
• Klöck F. K., Hartmer L. Die Kardiotokographie mit dem externen fetalen EKG im Vergleich zur Ultraschallkardiotokographie. Z Geburtshilfe Perintol 1977; 181: 178
   Google Scholar
• Knapp L. Ueber die Verwendbarkeit des Phonendoskopes von Bianchi und Bazzi in der Geburtshilfe. Prager Medicinische Wochenschr 1896; 46: 521
   Google Scholar
• Knox G. E., Huddleston J. F., Flowers C. E., Eubanks A., Sutliff G. Management of prolonged pregnancy: Results of prospective randomized trial. Am J Obstet Gynecol 1979; 134: 376
   PubMed Web of Science ®Google Scholar
• Koller W. S., Curet L. B. Fetal activity determinations and oxytocin challenge tests for assessment of fetal well-being. Obstet Gynecol 1978; 52: 176
   Google Scholar
• Krebs H. B., Petres R. E. Clinical application of a scoring system for evaluation of antepartum fetal heart rate monitoring. Am J Obstet Gynecol 1978; 130: 765
   PubMed Web of Science ®Google Scholar
• Krebs H. B., Petres R. E., Dunn L. J., Jordaan H. V. F., Segreti A. Intrapartum fetal heart rate monitoring. I. Classification and prognosis of fetal heart rate patterns. Am J Obstet Gynecol 1979; 133: 762
   PubMed Web of Science ®Google Scholar
• Krebs H. B., Petres R. E., Dunn L. J., Jordaan H. V. F., Segreti A. Intrapartum fetal heart rate monitoring. II. Multifactorial analysis of intrapartum fetal heart rate tracings. Am J Obstet Gynecol 1979; 133: 773
   PubMedGoogle Scholar
• Kubli F. Fetale Gefahrenzustände und ihre Diagnose. Georg Thieme Verlag, Stuttgart 1966
   Google Scholar
• Kubli F. W., Kaeser O., Hinselmann M. Diagnostic management of chronic placental insufficiency. the foeto-placental unit. Excerpta Medica Foundation, Amsterdam 1968
   Google Scholar
• Kubli F., Rüttgers H. Kontinuerliche Registrierung der fetalen Herzfrequenz bei gleichzeitiger Wehenschreibung. Gynäkologe 1969; 2: 73
   Google Scholar
• Kubli F. W., Hon E. H., Khazin A. F., Takemura H. Observations on heart rate and pH in the human fetus during labor. Am J Obstet Gynecol 1969; 104: 1190
   PubMed Web of Science ®Google Scholar
• Kubli F., Rüttgers H., Haller U., Bogdan C., Ramzin M. Die antepartale fetale Herzfrequenz. II. Verhalten von Grundfrequenz, Fluktuation und Dezelerationen bei antepartalem Fruchttod. Z Geburtshilfe Perinatol 1972; 176: 309
   Google Scholar
• Kubli F., Rüttgers H. Semiquantitative evaluation of antepartum fetal heart rate. Int J Gynaecol Obstet 1972; 10: 180
   Google Scholar
• Kubli F., Rüttgers H., Beard R. W., Hammacher K. Probleme und Bedeutung der kardiotokographischen Überwachung des Fetus (Ein schriftliches Symposium). Geburtshilfe Frauenheilkd 1974; 34: 1
   Google Scholar
• Lackritz R., Schiff I., Gobson M., Safon L. Decelerations on fetal electrocardiography with fetal demise. Obstet Gynecol 1978; 51: 367
   Google Scholar
• Laros R. K., Wong W. S., Heilbron D. C., Parer J. T., Shnider S. M., Naylor H., Butler J. A comparison of methods for quantitating fetal heart rate variability. Am J Obstet Gynecol 1977; 128: 381
   PubMed Web of Science ®Google Scholar
• Lee C. Y., Di Loreto P. C., O'Lane J. M. A study of fetal heart rate acceleration patterns. Obstet Gynecol 1975; 45: 142
   PubMed Web of Science ®Google Scholar
• Lee C. Y., Di Loreto P. C., Logrand B. Fetal activity acceleration determination for the evaluation of fetal reserve. Obstet Gynecol 1976; 48: 19
   PubMed Web of Science ®Google Scholar
• Lee C. Y., Drukker B. The nonstress test for the antepartum assessment of fetal reserve. Am J Obstet Gynecol 1979; 134: 460
   Google Scholar
• Lee W. K., Baggish M. S. The effect of unselected intrapartum fetal monitoring. Obstet Gynecol 1976; 47: 516
   PubMedGoogle Scholar
• Lenstrup C., Falck Larsen J. The cardiotocogram in foetuses at risk. Ugeskr Laeger 1979; 141: 1485
   Google Scholar
• Leventhal J. M., Brown W. U., Weiss J. B., Alper M. H. A new method of fetal heart rate monitoring. Obstet Gynecol 1975; 45: 494
   Google Scholar
• Liu D. T. Y., Blackwell R. J., Tukel S. The relevance of antenatal and intrapartum fetal heart rate patterns to fetal outcome. Br J Obstet Gynaecol 1978; 85: 270
   PubMedGoogle Scholar
• Low J. A., Boston R. W., Pancham S. R. The role of fetal heart rate patterns in the recognition of fetal asphyxia with metabolic acidosis. Am J Obstet Gynecol 1971; 109: 922
   PubMedGoogle Scholar
• Low J. A., Pancham S. R., Worthington D. N. Intrapartum fetal heart rate profiles with and without fetal asphyxia. Am J Obstet Gynecol 1977; 127: 729
   PubMed Web of Science ®Google Scholar
• Low J. A., Pancham S. R., Piercy W. N., Worthington D., Karchmar J. Intrapartum fetal asphyxia: Clinical characteristics, diagnosis, and significance in relation to pattern of development. Am J Obstet Gynecol 1977; 129: 857
   Google Scholar
• Lyons E. R., Bylsma-Howell M., Shamsi S., Towell M. E. A scoring system for nonstressed antepartum fetal heart rate monitoring. Am J Obstet Gynecol 1979; 133: 242
   Google Scholar
• Löwi S. Über einen neuen wehenzeichnenden Apparat (Tokograph). Zentralbl Gynaekol 1933; 10: 554
   Google Scholar
• Manning F. A., Platt L. D., Sipos L. Antepartum fetal evaluation: Development of a fetal biophysical profile. Am J Obstet Gynecol 1980; 136: 787
   PubMed Web of Science ®Google Scholar
• Manseau P., Vaquier J., Chaviniè J., Sureau C. Le rythme cardiaque foetal “sinusoidal”. Aspect évocateur de souffrance foetale au cours de la grossesse. J Gynecol Obstet Biol Reprod 1972; I: 343
   Google Scholar
• Marcum R. G. False negative oxytocin challenge test. Am J Obstet Gynecol 1977; 127: 894
   Google Scholar
• Markawa M., Toyoshima J. Fetal electrocardiograms of one human subject. Acta Sch Med Univ Kioto 1930; 12
   Google Scholar
• Martin C. B., Siassi B., Hon E. H. Fetal heart rate patterns and neonatal death in low birthweight infants. Obstet Gynecol 1974; 44: 503
   PubMed Web of Science ®Google Scholar
• Mayes B. T., Bradfield A., Smyth E. J. Clinical experience in foetal electrocardiography. Med J Aust 1963; II: 905
   Google Scholar
• Mayor F. I. Bibliotheque universelle des sciences. Belles lettres et arts etc 1818; IX(8)249, Genéve
   Google Scholar
• McCranie W. M., Niebyl J. R. A false negative oxytocin challenge test. Obstet Gynecol 1977; 49: 241
   Google Scholar
• Mendenhall H. W., O'Leary J. A., Phillips K. O. The nonstress test: The value of a single acceleration in evaluating the fetus at risk. Am J Obstet Gynecol 1980; 136: 87
   Google Scholar
• Mèndez-Bauer C., Arnt I. C., Gulin L., Escarcena L., Caldeyro-Barcia R. Relationship between blood pH and heart rate in the human fetus during labor. Am J Obstet Gynecol 1967; 97: 530
   Google Scholar
• Merkur H. Normal and abnormal antenatal ultrasonic cardiographic patterns. Br J Obstet Gynaecol 1979; 86: 533
   PubMedGoogle Scholar
• Modanlou H. D., Freeman R. K., Braly P., Rasmussen S. B. A simple method of fetal and neonatal heart rate beat-to-beat variability quantitation: Preliminary report. Am J Obstet Gynecol 1977; 127: 861
   Google Scholar
• Mosler K. H. Dauerüberwachung der fetalen Herzaktionen unter der Geburt mittels Ultraschall. Experientia 1969; 25: 222
   Google Scholar
• Murata Y., Martin C. B. Systolic time intervals of the fetal cardiac cycle. Obstet Gynecol 1974; 44: 224
   PubMedGoogle Scholar
• Myers R. E., Mueller-Heubach E., Adamsons K. Predictability of the state of fetal oxygenation from a quantitative analysis of the components of late deceleration. Am J Obstet Gynecol 1973; 115: 1083
   Google Scholar
• Nochimson D. J., Turbeville J. S., Terry J. E., Petrie R. H., Lundy L. E. The nonstress test. Obstet Gynecol 1978; 51: 419
   Google Scholar
• Novo Dominguez A., Crende Corbeira M. S., Sandoval González-Conde C., Montalvo Montes J., Cálves Hernández E. Significance of the transient bradycardic pattern in prepathological oxytocin stress test. Z Geburtshilfe Perinatol 1978; 182: 294
   Google Scholar
• Odendaal H. Fetal heart rate patterns during delivery in patients with intrauterine growth retardation. Obstet Gynecol 1976; 48: 187
   Google Scholar
• Odendaal H. J. False interpretation of fetal heart rate monitoring in cases of intra-uterine death. S Afr Med J 1976; 50: 1963
   Google Scholar
• Odendaal H. J. The fetal and labor outcome of 102 positive contraction stress tests. Obstet Gynecol 1979; 54: 591
   Google Scholar
• Papiernik E., Hajeri H. Systemic fetal heart rate monitoring and perinatal mortality. Contr Gynecol Obstet 1977; 3: 47
   Google Scholar
• Paul R. H., Hon E. H. A clinical fetal monitor. Obstet Gynecol 1970; 35: 161
   PubMed Web of Science ®Google Scholar
• Paul R. H., Khazin Suidan A., Yeh S. Y., Schifrin B. S., Hon E. H. Clinical fetal monitoring. VII. The evaluation and significance of intrapartum baseline FHR variability. Am J Obstet Gynecol 1975; 123: 206
   PubMed Web of Science ®Google Scholar
• Paul R. H. Fetal bradycardia. Obstet Gynecol 1976; 47: 127
   Google Scholar
• Paul R. H., Koh K. S., Bernstein S. G. Changes in fetal heart rate—uterine contraction patterns associated with eclampsia. Am J Obstet Gynecol 1978; 130: 165
   Google Scholar
• Pearson J. F., Weaver J. B. A six-point scoring system for antenatal cardiotocographs. Br J Obstet Gynaecol 1978; 85: 321
   Google Scholar
• Peleg D., Goldman J. A. Fetal heart rate acceleration in response to light stimulation as a clinical measure of fetal well-being. A preliminary report. J Perinat Med 1980; 8: 38
   PubMedGoogle Scholar
• Pestalozzi P. Graphische Darstellung des fötalen Herzimpulses. Arch Gynaekol 1891; 39: 137
   Google Scholar
• Pose S. V., Castillo J. B., Mora-Rojas E. O., Soto-Yances A., Caldeyro-Barcia R. Test of fetal tolerance to induced uterine contractions for the diagnosis of chronic distress. Pan Am Health Org Sci Publ 1969; 185: 96
   Google Scholar
• Pratt J., Diamond F., Yen H., Bieniarz J., Burd L. Fetal stress and nonstress tests: An analysis and comparison of their ability to identify fetal outcome. Obstet Gynecol 1979; 54: 419
   Google Scholar
• Pütz T., Ullrich O. Fortschritte auf dem Gebiet der fetalen Elektrokardiogrammforschung. Arch Gynaekol 1941; 171: 199
   Google Scholar
• Ray M., Freeman R., Pine S., Hesselgesser R. Clinical experience with the oxytocin challenge test. Am J Obstet Gynecol 1972; 114: 1
   PubMed Web of Science ®Google Scholar
• Rech W. Untersuchungen Uber die Herztatigkeit des Fetus. Arch Gynäkol 1931; 145: 714
   Google Scholar
• Rech W. Untersuchungen über die Herztatätikeit des Fetus. II. Der Einfluss von Sauerstoff und Kohlensäure auf die Frequenz des fetalen Herzschlages. Arch Gynäkol 1931; 147: 92
   Google Scholar
• Rech W., Clamann H. G. Eine neue Methode der fortlaufenden Frequenzregistrierung und lautstarken Wiedergabe der fetalen Herztöne. Z Gesamte Experim Med 1931; 76: 108
   Google Scholar
• Rech W. Untersuchungen über die Herztätigkeit des Fetus. III. Die Wirkung des Kopfdruckes auf die Frequenz des fetalen Herzschlages. Arch Gynäkol 1933; 154: 47
   Google Scholar
• Richter R., Hohl M., Hammacher K., Lüscher K. P., Stucki D. Significance of oscillation frequency in intrapartum fetal monitoring. Obstet Gynecol 1977; 50: 694
   Google Scholar
• Rihl J., Weinzierl E. Beitrag zur Frage der fetalen Herzarhythmie. I. Klinischer Teil. Arch Gynäkol 1927; 130: 626
   Google Scholar
• Rihl J. Beitrag zur Frage der fetalen Herzarythmie. II. Analyse der Herzunregelmässigkeiten. Arch Gynäkol 1927; 130: 638
   Google Scholar
• Rochard F., Schifrin B. S., Goupil F., Legrand H., Blottiere J., Sureau C. Nonstressed fetal heart rate monitoring in the antepartum period. Am J Obstet Gynecol 1976; 126: 699
   PubMed Web of Science ®Google Scholar
• Roederer. Elementa artis obstetriciaeEd. II. von H. A. Wrisberg., Göttingen 1766
   Google Scholar
• Roemer V. M., Heinzl S. Zur Frage der Quantifizierung von Oszillationsfrequenz und Oszillation-samplitude in der direkten Kardiotokographie. Z Geburtshilfe Perinatol 1979; 183: 396
   Google Scholar
• Roemer V. M., Heinzl S., Peters F. D., Mietzner S., Brühl G., Heering P. Oscillation-frequency and baseline fetal heart rate in the last 30 minutes of labour. Br J Obstet Gynaecol 1979; 86: 472
   Google Scholar
• Rüttgers H., Kubli F. Kontinuierliche Registrierung von fetaler Herzfrequenz bei gleichzeitiger Wehenschreibung. II. Probleme der Instrumentierung. Gynäkologe 1969; 2: 82
   Google Scholar
• Rüttgers H., Kubli F., Hinselmann M., Grund K. Continuous monitoring of instantaneous fetal heart rate by Doppler-ultrasound. Proceedings of the Conference on Ultrasonics in Biology and Medicine UBIOMED-70, Jablonna-Warsaw. October, 5–101970
   Google Scholar
• Rüttgers H., Kubli F., Haller U., Bachmann M., Grunder E. Die antepartale fetale Herzfrequenz. I. Verhalten von Grundfrequenz, Fluktuation und Dezelerationen in der ungestörten Schwangerschaft. Z Geburtshilfe Perinatol 1972; 176: 294
   Google Scholar
• Rüttgers H. Technik. Registrierprinzipen und Registrierfehler von Kardiotokographen. Kardiotokographie. Lehrbuch und Atlas. Georg Thieme Verlag, Stuttgart 1973
   Google Scholar
• Rüttgers H. Kritische Bilanz der ante- und intrapartalen Kardiotokographie. Gynäkologe 1974; 7: 13
   Google Scholar
• Rüttgers H., Meyer-Menk W., Stagel A., Spangler W., Kubli F. Instantane fetale Herzfrequen-zregistrierung über das abdominale EKG. Gynaekol Rundsch 1974; 14: 79
   Google Scholar
• Sachs E. Untersuchungen über die kindlichen Herztdne. Z Geburtshilfe Gynaekol 1920; 82: 352
   Google Scholar
• Sachs H. Elektrokardiogrammstudien am Foetus in utero. Plügers Archiv f. d. ges. Physiol 1922; 197
   Google Scholar
• Salerno N. J., Kay T. R. A further challenge to the validity of the weekly interval between oxytocin challenge test. Am J Obstet Gynecol 1978; 130: 849
   Google Scholar
• Saling E. Verbesserung der apparativen Herzschlagregistrierung beim Feten unter der Geburt. Fortschr Med 1969; 87: 777
   Google Scholar
• Saling E. The measurement of fetal heart rate and acid-base balance. Perinatal Medicine, P. I. Huntingford, R. W. Beard, F. E. Hytten, J. W. Scopes. Karger, Basel 1971
   Google Scholar
• Saling E. Z., Dudenhausen J. W. The present situation of clinical monitoring of the fetus during labor. J Perinat Med 1973; 1: 75
   Google Scholar
• Scanlon J. W., Suzuki K., Shea E., Tronick E. A prospective study of the oxytocin challenge test and newborn neurobehavioral outcome. Obstet Gynecol 1979; 54: 6
   Google Scholar
• Schatz F. Beiträge zur physiologischen Geburtskunde. Arch Gynaekol 1872; 3: 75
   Google Scholar
• Schatz F. Ueber die schon in der Schwangerschaft und in der ersten Hälfte der Geburt zu stellende Diagnose der Umschlingung der Nabelschnur. Arch Gynaekol 1885; 25: 158
   Google Scholar
• Schifrin B. S., Dame L. Fetal heart rate patterns. Prediction of Apgar score. JAMA 1972; 219: 1322
   Google Scholar
• Schifrin B. S., Lapidus M., Doctor G. S., Leviton A. Contraction stress test for antepartum fetal evaluation. Obstet Gynecol 1975; 45: 433
   PubMed Web of Science ®Google Scholar
• Schifrin B. S., Foye G., Amato J., Kates R., MacKenna J. Routine fetal heart rate monitoring in the antepartum period. Obstet Gynecol 1979; 54: 21
   PubMedGoogle Scholar
• Schmidt H., Czerny H., Morgensterns J., Schulz J., Wernicke K. Kardiovaskuläre Änderungen des fetalen Kreislaufs wlhrend Dezelerationen bei akuter fetaler Hypoxie. Z Geburtshilfe Perinatol 1979; 183: 101
   Google Scholar
• Schmidt P. L., Thorneycroft I. H., Goebelsmann U. Fetal distress following a reactive nonstress test. Am J Obstet Gynecol 1980; 136: 960
   Google Scholar
• Schulrnan H., Lin C. C., Saldana L., Randolph G. Qunatitative analysis in the oxytocin challenge test. Am J Obstet Gynecol 1977; I29: 239
   Google Scholar
• Schulz J., Wernicke K., Lade R., Berg D., Sturm R., Wiesner F., Wurms U. Fetale Sauerstoffversorgung bei sogenannten variablen Herzfre-quenzdezelerationen.—Über Vorkommen, Verlauf und Wertigkeit fetaler Hypoxie bei Nabelschnurkompressionen. Arch Gynaekol 1975; 219: 289
   Google Scholar
• Schwarz G. Die graphische Darstellung fetaler Herztöne. Klin Wochenschr 1926; 11: 451
   Google Scholar
• Schwartz H. Die vorzeitigen Atembewegungen. Leipzig 1858
   Google Scholar
• Schäffer H. Die Verstärkung und Hörbarmachung der fötalen Herztöne mittels Kathodenröhren. Klin Wochenschr 1923; 44: 2058
   Google Scholar
• Seitz L. Die fötalen Herztöne während der Geburt. Thesis, München 1903
   Google Scholar
• Shelley T., Tipton R. H. Dip area. A quantitative measure of fetal heart rate patterns. J Obstet Gynaecol Br Commonw 1971; 78: 694
   PubMedGoogle Scholar
• Shenker L. Fetal electrocardiography. Obstet Gynecol Surv 1966; 21: 367
   Google Scholar
• Shenker L. Clinical experiences with fetal heart rate monitoring of one thousand patients in labor. Am J Obstet Gynecol 1973; 115: 1111
   PubMedGoogle Scholar
• Sibai B. M., Lipshitz J., Schneider J. M., Anderson G. D., Morrison J. C., Dilts P. V. Sinusoidal fetal heart rate pattern. Obstet Gynecol 1980; 55: 637
   Google Scholar
• von Siebold E. C. J. Versuch einer Geschichte der Geburtshilfe. Enslin Verlag, Berlin 1845; Band II
   Google Scholar
• Simmons S. C., Trickey N. R. A. Antepartum fetal heart monitoring. Br Med J 1977; ii: 186
   Google Scholar
• Smith R. P., Hoxsey R. J., Bayly M. A. Monitoring of fetal heart rate and uterine activity in clinically uncomplicated pregnancy and labor. Ill Med J 1976; 149: 58
   Google Scholar
• Solum T., Sjöberg N. O. Antenatal cardiotocography and intrauterine death. Acta Obstet Gynecol Scand 1980; 59: 481
   Web of Science ®Google Scholar
• Sontag L. W., Newbery H. Normal variations of fetal heart rate during pregnancy. Am J Obstet Gynecol 1940; 40: 449
   Google Scholar
• Southern E. M. Electrocardiography and phonocardiography of the foetal heart. J Obstet Gynaecol Br Commonw 1954; 61: 231
   Google Scholar
• Spellacy W. N., Cruz A. C., Kalra P. S., Kellner K. R., Quinlan R. W., Buhi W. C., Birk S. A. Oxytocin challenge test results compared with simultaneously studied serum human placental lactogen and free estriol levels in high-risk pregnant women. Am J Obstet Gynecol 1979; 135: 917
   Google Scholar
• Spurrett B. Stressed cardiotocography in late pregnancy. J Obstet Gynaecol Br Commonw 1971; 78: 894
   Google Scholar
• Strassmann E. O. Technic and results of routine fetal electrocardiograpy during pregnancy. Proc Staff Meet, Mayo Clin 1938; 13: 251
   Google Scholar
• Steer P. J., Little D. J., Lewis N. L., Kelly M. C.M. E., Beard R. W. The effect of membrane rupture on fetal heart rate in induced labour. Br J Obstet Gynaecol 1976; 83: 454
   Google Scholar
• Sureau C., Trocellier R. Un problème technique d'électrocardiographie foetale. Note sur l'élimination de l'électrocardiogramme maternel. Gynécol Obstét 1961; 60: 43
   Google Scholar
• Sureau C., Chavinié J., Michelon B., Feldman J. P., Cannon M., Le Houezec R. Le problème du rythme cardiaque foetal. Difficultés d'interprétation. Solutions techniques. Gynécol Obstét (Paris) 1970; 69: 259
   Google Scholar
• Sureau C. Travaux du “Comite d'Amsterdam”. J Gyn Obstet Biol Reprod 1974; 3: 931
   Google Scholar
• Tejani N., Mann L. I., Bhakthavathsalan A., Weiss R. R. Correlation of fetal heart rate – uterine contraction patterns with fetal scalp blood pH. Obstet Gynecol 1975; 46: 392
   PubMed Web of Science ®Google Scholar
• Tejani N., Mann L. I., Bhakthavathsalan A. Correlation of fetal heart rate patterns and fetal pH with neonatal outcome. Obstet Gynecol 1976; 48: 460
   PubMed Web of Science ®Google Scholar
• Tejani N. A., Mann L. I., Sanghavi M., Bhakthavathsalan A., Weiss R. R. The association of umbilical cord complications and variable decelerations with acid-base findings. Obstet Gynecol 1977; 49: 159
   PubMed Web of Science ®Google Scholar
• Thieme Y., Eichmeier J. Ein Verfahren zur Registrierung der fetalen Herzschlagfrequenz aus dem abdominalen Elektrokardiogramm. Biomed Tech 1971; 16: 173
   Google Scholar
• Tipton R. H., Shelley T. An index of fetal welfare in labour. J Obstet Gynaecol Br Commonw 1971; 78: 702
   Google Scholar
• Trierweiler M. W., Freeman R. K., James J. Baseline fetal heart rate characteristics as an indicator of fetal status during the antepartum period. Am J Obstet Gynecol 1976; 125: 618
   PubMed Web of Science ®Google Scholar
• Trimbos J. B., Keirse M. J. N. C. Significance of antepartum cardiotocography in normal pregnancy. Br J Obstet Gynaecol 1978; 85: 907
   Google Scholar
• Tushuizen P. B. T., Stoot J. E.G. M., Ubachs J. M. H. Fetal heart rate monitoring of the dying fetus. Am J Obstet Gynecol 1974; 120: 922
   PubMedGoogle Scholar
• Tushuizen P. B. T., Stoot J. E. G. M., Ubachs J. M. H. Clinical experience in nonstressed antepartum cardiotocography. Am J Obstet Gynecol 1977; 1281507
   Google Scholar
• Ulsamer A. Auscultation bei Schwangeren. C. F. Harless, Reinische Jahrbücher Medicin und Chirurgie, Elberfeld 1828
   Google Scholar
• Walden W. D., Birnbaum S. J. Fetal electrocardiography with cancellation of maternal complexes. Am J Obstet Gynecol 1966; 94: 596
   Google Scholar
• Weingold A. B., DeJesus T. P. S., O'Keiffe J. Oxytocin challenge test. Am J Obstet Gynecol 1975; 123: 466
   Google Scholar
• Weiss O. Die Registrierung der menschlichen Herztöne durch Seifenhëutchen. Arch Psychol 1907; 9: 463
   Google Scholar
• Werch A., Hinkley C. M., Wait R. B. Fetal monitoring. Tex Med 1977; 73: 42
   Google Scholar
• van Wering J. H., van der Slikke J. W., Treffers P. E., Bleker O. P. Antepartum cardiotocography in four cases of partial abruptio placentae. Eur J Obstet Gynecol Reprod Biol 1978; 8/6: 353
   Google Scholar
• Wheeler T., Guerard P. Fetal heart rate during late pregnancy. J Obstet Gynaecol Br Commonw 1974; 84: 348
   Google Scholar
• Wheeler T., Murrills A. Patterns of fetal heart rate during normal pregnancy. Br J Obstet Gynaecol 1978; 85: 18
   PubMedGoogle Scholar
• Wheeler T., Cooke E., Murrills A. Computer analysis of fetal heart rate variation during normal pregnancy. Br J Obstet Gynaecol 1979; 86: 186
   PubMedGoogle Scholar
• Wheeler T., Murrills A., Shelley T. Measurement of the fetal heart rate during pregnancy by a new electrocardiographic technique. Br J Obstet Gynaecol 1978; 85: 12
   PubMedGoogle Scholar
• Whitson L. G. FHR acceleration. Obstet Gynecol 1976; 47: 254
   Google Scholar
• von Winckel F. Lehrbuch der Geburtshilfe. Leipzig 1893
   Google Scholar
• Visserr G. H. A., Huisjes W. J. Diagnostic value of the unstressed antepartum cardiotocogram. Br J Obstet Gynaecol 1977; 84: 321
   Google Scholar
• Visser G. H. A., Goodman J. D. S., Dawes G. S. Problem with ultrasonic fetal heart rate monitor. Lancet 1980; i: 707
   Google Scholar
• Visser G. H. A., Dawes G. S., Goodman J. D. S., Levine D. H. Numerical analysis of the fetal heart rate: Diurnal and other cyclic variations. Abstracts of the 7th European Congress of Perinatal Medicine, A. Ballabriga, A. Gallart. Barcelona 1980
   Google Scholar
• Wood C., Ferguson R., Leeton J., Newman W., Walker A. Fetal heart rate and acid-base status in the assessment of fetal hypqxia. Am J Obstet Gynecol 1967; 98: 62
   PubMedGoogle Scholar
• Wood C., Walker A., Yardley R. Acceleration of the fetal heart rate. Am J Obstet Gynecol 1979; 134: 523
   Google Scholar
• Yeh S. Y., Forsythe A., Hon E. H. Quantification of fetal heart beat-to-beat interval differences. Obstet Gynecol 1973; 41: 355
   PubMed Web of Science ®Google Scholar
• Young B. K., Katz M., Klein S. A. The relationship of heart rate patterns and tissue pH in the human fetus. Am J Obstet Gynecol 1979; 134: 685
   Google Scholar
• Young B. K., Katz M., Wilson S. J. Sinusoidal fetal heart rate. I. Clinical significance. Am J Obstet 1980; 136: 587
   Google Scholar
• Zilianti M., Segura C. L., Cabello F., Benzaquen J., Romero M., Estrada M. A. Studies on fetal bradycardia during birth process: I. Obstet Gynecol 1973; 42: 831
   Google Scholar
• Zuspan F. P., Quilligan E. J., Iams J. D., van Geijn H. P. Predictors of intrapartum fetal distress: The role of electronic fetal monitoring. Obstet Gynecol 1979; 135: 287
   Google Scholar