Table 1

Characteristics and result of the first nine patients undergoing atrial septostomy at Freeman Hospital

No.	Sex	Age	Diagnosis	NYHA class	Symptoms	MVo₂ (%)	RAP (mmHg)	Cardiac index (l/min/m²)	mPAP (mmHg)	PVR index (WU.m²)	NIH probability of surviving 2 years	0₂ saturation before	0₂ saturation after	Size of largest balloon	Procedure	Syncope relieved	Repeat procedure
NIH probability refers to the likelihood of surviving 2 years from the date of the right heart catheter based on the regression equation from D’Alonzo et al¹ using haemodynamic parameters.
MVo₂, mixed venous oxygen saturation; NA, not available; NYHA, New York Heart Association; mPAP, mean pulmonary artery pressure, PPH, primary pulmonary hypertension; PVR, pulmonary vascular resistance; RAP, right atrial pressure; SSc, scleroderma.
1	F	33.5	PPH	III	Pre-syncope	NA	13	1.56	67	37.2	0.45	94	89	15	Uneventful	Yes	At 15 months hole reopened
2	F	57.0	SSc	IV	Syncope	60.2	16	1.34	59	37.2	0.42	93	91	18	Uneventful	Yes	No
3	F	72.3	PPH	IV	Pre-syncope	NA	24	1.51	50	24.6	0.37	95	87	15	Uneventful	Yes	At 4 months hole enlarged to 20 mm
4	F	68.8	PPH	IV	Syncope	67	12	1.76	56	28.4	0.50	97	78	12	Thyrotoxic at time of procedure	Yes	No
5	F	25.9	PPH	III	Syncope	65	5	1.82	51	24.7	0.61	99	85	12	BP dropped for procedure. Transfused 2 units	Yes	At 3 months hole enlarged to 18 mm
6	F	24.5	PPH	III	Pre-syncope	55	8	1.43	53	34.2	0.53	97	84	18	Uneventful	Yes	No
7	F	76.3	SSc	IV	Pre-syncope	61	7	1.49	37	20.2	0.59	98	93	18	Uneventful	Yes	No
8	F	80.2	SSc	IV	Syncope	62	8	1.82	55	25.8	0.55	95	91	18	Transfused pre-procedure. Uneventful	Yes	No
9	F	69.2	PPH	IV	Syncope	59	6	1.44	53	31.3	0.56	96	87	12	Uneventful	Yes	No