Table 5.

2D echocardiographic indices of neo-aortic and tricuspid valve dimensions and functions at three post-operative intervals by shunt type.

Variable	Post-Norwood					Pre-stage II					14 months
	N	MBTS	N	RVPAS	p	N	MBTS	N	RVPAS	p	N	MBTS	N	RVPAS	p
Neo-aortic valve
Neo-aortic valve annular area (cm2)/BSA	224	4.64±1.16	228	4.21±1.13	<0.001	164	4.91±1.21	205	4.15±1.15	<0.001	137	4.31±1.08	171	4.18±1.09	0.33
Neo-aortic valve annular area, z-score	224	7.04±3.02	228	5.92±2.94	<0.001	164	8.02±3.24	205	5.99±3.09	<0.001	137	6.53±2.96	171	6.20±2.98	0.34
Neo-aortic AP valve annulus diameter (cm2)/√BSA	229	2.38±0.35	234	2.26±0.36	<0.001	168	2.44±0.35	212	2.23±0.33	<0.001	143	2.30±0.33	176	2.26±0.36	0.23
Neo-aortic AP valve annulus diameter, z-score	229	4.70±2.02	234	4.01±2.06	<0.001	168	5.60±2.26	212	4.29±2.09	<0.001	143	5.02±2.22	176	4.72±2.42	0.25
Degree of neo-aortic valve regurgitation	238		242		0.19, 0.07*	175		220		0.17, 0.73*	147		186		0.08, 0.08*
none		132 (56%)		120 (50%)			106 (61%)		148 (67%)			65 (44%)		104 (56%)
mild		103 (43%)		114 (47%)			66 (38%)		69 (31%)			77 (52%)		79 (43%)
moderate		3 (1%)		8 (3%)			3 (2%)		1 (1%)			5 (3%)		3 (1%)
severe		0 (0%)		0 (0%)			0 (0%)		2 (1%)			0 (0%)		0 (0%)
Tricuspid valve
Tricuspid annular area (cm2)/BSA	224	7.10±2.02	232	7.01±2.01	0.63	171	7.27±2.20	211	7.07±2.62	0.42	146	6.18±1.95	181	6.61±2.09	0.05
Tricuspid annular area, z-score	224	3.23±1.88	232	3.16±1.93	0.70	171	3.82±2.31	211	3.62±2.77	0.46	146	2.89±2.25	181	3.41±2.43	0.05
Tricuspid AP valve annulus diameter (cm2)/√BSA	225	2.89±0.50	235	2.86±0.48	0.60	171	2.92±0.50	213	2.85±0.58	0.22	148	2.65±0.50	182	2.79±0.51	0.02
Tricuspid AP valve annulus diameter,z-score	225	2.12±1.71	235	2.04±1.63	0.63	171	2.46±1.79	213	2.22±2.10	0.24	148	1.61±1.86	182	2.12±1.89	0.01
Tricuspid transverse valve annulus diameter (cm2)/√BSA	235	3.07±0.51	238	3.07±0.51	0.97	174	3.13±0.54	220	3.07±0.58	0.33	146	2.91±0.51	184	2.96±0.51	0.36
Tricuspid transverse valve annulus diameter, z-score	235	1.78±1.30	238	1.80±1.35	0.91	174	2.32±1.55	220	2.17±1.68	0.37	146	1.95±1.61	184	2.14±1.61	0.31
Degree of tricuspid regurgitation	237		243		0.68, 0.86*	175		222		0.09, 0.63*	148		185		0.88, 0.89*
none		28 (12%)		29 (12%)			31 (18%)		50 (23%)			24 (16%)		27 (15%)
mild		148 (62%)		159 (65%)			97 (55%)		114 (51%)			94 (64%)		115 (62%)
moderate		48 (20%)		47 (19%)			33 (19%)		51 (23%)			25 (17%)		34 (18%)
severe		13 (6%)		8 (3%)			14 (8%)		7 (3%)			5 (3%)		9 (5%)

Data presented as mean±SD or n (%). MBTS=modified Blalock-Taussig shunt; RVPAS=right ventricular-to-pulmonary artery shunt

^*P-values obtained from Fisher’s exact test and Mantel-Haenszel test of trend respectively.