Spontaneous closure of perimembranous ventricular septal defect after school age

Abstract

SC occurred in 23% of patients with a P-VSD of Qp/Qs < 1.7 up to adolescence. But a P-VSD of Qp/Qs >or= 1.2 showed no tendency to close spontaneously. The factor most influencing SC of P-VSD after school age seemed to be the shunt ratio.