A ventricular septal defect (VSD) occurs when there is direct ... supracristal (infundibular or subpulmonic) or muscular. Membranous VSDs are the most common type and originate inferior to the ...
Pulmonary-to-aortic root ratio, subpulmonic chamber size and supravalvar ... We excluded 5 pts with a large residual VSD (Qp:Qs>1.8): 4/20 3-4+ pts and 1/33 pts with 1-2+ AN.