New method for noninvasive estimation of ventricular septal defect shunt by doppler color flow mapping: imaging of the laminar flow convergence region on the left septal surface - Moises, V A; Maciel, B C; Hornberger, L K; Murillo-Olivas, A; Cruz, L M V; Sahn, D J; Weintraub, R G (Journal of the American College of Cardiology, 1991)