Doppler measures of blood flow in right and left branches of the fetal pulmonary artery

Figures & data

Figure 1. Pulmonary artery Doppler blood flow velocity waveforms: the method of tracing.

Table 1. Results of Doppler recordings from both the right and left branch of the pulmonary artery in 62 fetuses at 30 gestational weeks, given as mean (95% confidence interval).

	RPA	LPA	p-Value*
Sampling angle (°)	3.4 (2.0,4.5)	4.5 (3.3,5.7)	.14
PI	2.85 (2.78,2.92)	2.91 (2.82,3.00)	.13
PSV (cm/s)	80.9 (77.8,84.1)	73.5 (70.8,76.4)	<.001
TAMX (cm/s)	25.0 (24.0,26.0)	22.3 (21.5,23.1)	<.001
TVI (cm)	10.8 (10.3,11.2)	9.54 (9.1,9.9)	<.001
FHR (bpm)	140 (138,141)	141 (139,143)	.09
AT (ms)	35.2 (34.4,36.1)	32.3 (31.4,33.0)	<.001
ET (ms)	185.1 (182.9,187.4)	183.6 (181.4,185.8)	.19
AT/ET	0.191 (0.186,0.195)	0.176 (0.171,0.180)	<.001
TOH (ms)	428 (425,435)	430 (421,432)	.56

*Paired-samples t-test comparing right and left pulmonary artery.

AT: acceleration time; bpm: beats per minute; ET: ejection time; FHR: fetal heart rate; LPA: left pulmonary artery; PI: pulsatility index; PSV: peak systolic velocity; RPA: right pulmonary artery; TAMX: time averaged maximum velocity; TOH: time of one heart cycle; TVI: time velocity integral.