TABLE 4.

Genetic findings reported as the primary World Symposium on Pulmonary Hypertension (WSPH) classification

Group 1: Pulmonary arterial hypertension (PAH)
1.2 Heritable	40 (100)
1.2.1 BMPR2	17 (43)
1.2.2 ALK1/ENG (with or without hereditary haemorrhagic telangiectasia)	5 (13)
1.2.3 SMAD9	0 (0)
1.2.4 CAV1	1 (3)
1.2.5 KCNK3	1 (3)
1.2.6 Unknown	6 (15)
1.2.7 Other	10 (25)
TBX4	6 (15)
GDF2 mutation	2 (5)
Other/family history	2 (5)

Data are presented as n (%); all percentages are based WSPH Group 1.2 heritable disease (n=40) as the denominator.