Table 2.

Anatomic Dimensions on Preintervention/Midgestation Echocardiogram and at Late-Gestation Follow-Up Among Patients and Comparison Fetuses

Variable	Technically Successful Intervention (n=45)*			Comparison Fetuses (n=21)			P
	Pre-intervention	Follow-Up	P	Mid-gestation	Follow-Up	P
Gestational age, wk	23.9±2.1	34.0±2.7		23.2±3.6	32.7±3.1		0.31,* 0.11‡
Aortic annulus diameter Zscore	−2.5±0.9	−2.9±1.0	0.008	−2.3±1.2	−4.3±0.9	<0.001	0.55,† <0.001‡
Ascending aorta Zscore diameter	−0.4±2.0	−0.6±1.5	0.83	−0.8±1.9	−2.2±2.1	<0.001	0.44,† 0.001‡
LV long-axis dimension Zscore	0.9±1.8	−1.4±1.5	<0.001	0.0±1.3	−2.7±1.2	<0.001	0.03,† 0.002‡
LV short-axis dimension Zscore	3.0±2.7	−0.3±2.2	<0.001	2.4±2.2	−1.7±1.8	<0.001	0.3,† 0.02‡
MV annulus diameter Zscore	−1.2±1.2	−2.2±1.3	<0.001	−1.3±1.3	−4.3±1.3	<0.001	0.82,†<0.001‡
RV long-axis dimension Zscore	1.5±1.4	0.5±1.4	0.001	1.2±1.2	0.2±0.9	0.16	0.30,†0.46‡

Follow-up duration was 71.1±23.2 days in fetuses that underwent technically successful intervention and 68.2±24.9 days in comparison group fetuses (P=0.58). Data are presented as mean±SD.

^*Fetal deaths and fetuses still in utero excluded.

^†Preintervention/midgestation technically successful intervention versus comparison fetuses.

^‡Follow-up technically successful intervention versus comparison fetuses.