References
- Johnson P, Maxwell DJ, Tynan MJ, et al. Intracardiac pressures in the human fetus. Heart. 2000;84(1):59–63.
- Baumgartner H, Hung J, Bermejo J, et al. Echocardiographic assessment of valve stenosis: EAE/ASE recommendations for clinical practice. J Am Soc Echocardiogr. 2009;22(1):1–23.
- Maiz N, Kagan KO, Milovanovic Z, et al. Learning curve for Doppler assessment of ductus venosus flow at 11 + 0 to 13 + 6 weeks’ gestation. Ultrasound Obstet Gynecol. 2008;31(5):503–506.
- Gürses C. How to get ductus venosus flow velocity waveforms between 11 and 14 weeks: candle Flame and Falling Drop Signs. Med Ultrason. 2016;18(4):528–529.
- Martins WP, Kiserud T. How to record ductus venosus blood velocity in the second half of pregnancy. Ultrasound Obstet Gynecol. 2013;42(2):245–246.
- Bhide A, Acharya G, Bilardo CM, et al. ISUOG practice guidelines: use of Doppler ultrasonography in obstetrics. Ultrasound Obstet Gynecol. 2013;41(2):233–239.
- Kiserud T, Acharya G. The fetal circulation. Prenat Diagn. 2004;24(13):1049–1059.
- Abramowicz JS. Fetal Doppler: how to keep it safe? Clin Obstet Gynaecol. 2010;53(4):842–850.
- BMUS (British Medical Ultrasound Society). Guidelines for the safe use of diagnostic ultrasound equipment. Ultrasound. 2010;18(2):52–59.
- Chaoui R, Lenz F, Heling KS. Doppler examination of the fetal pulmonary venous circulation In: Maulik D, editor. Doppler ultrasound in obstetrics and gynecology. Heidelberg, Berlin: Springer; 2005.