Table 2.

Baseline Echocardiogram Findings

	n (%)
Measureable tricuspid regurgitant jet	17 (68)
Estimated sPAP, mm Hg, mean ± SD	67 ± 20
Estimated sPAP/ssBP, mean ± SD	0.79 ± 0.24
sPAP/ssBP ≥ 0.67	12 (48)
Septal flattening	25 (100)
Mild	8 (32)
Moderate	7 (28)
Severe	5 (20)
Degree not specified	5 (20)
Right atrial dilation	17 (68)
Right ventricular dilation	17 (68)
Right ventricular hypertrophy	18 (72)
Detectable shunt*	19 (76)
Atrial level	17 (68)
Patent ductus arteriosis	4 (16)
Direction of shunt flow
Left-to-right	10 (40)
Bidirectional	8 (32)
Right-to-left	1 (4)

sPAP = systolic pulmonary artery pressure; ssBP = systemic systolic blood pressure.

^*Two patients had both an atrial septal defect and a patent ductus arteriosus.