Cath: Ballon pulmonary angioplasty

Indications for intervention:

1) At least 50% stenosis by diameter

2) Lung perfusion scan showing more than 20% discrepancy between the two sides (Don't forget regional differences within the same lung)

3) RVSP >50% (or 70% by others)

4) Significant pulmonary regurgitation with moderate distal PA stenosis (Asso. RV enlargement)

Arbitrary definition of successful Balloon PA angioplasty:

1) More than 50% increase in diameter

2) 20% drop in RVSP