Phonocardiographic analysis of diastolic flow murmurs in secundum atrial septal defect and ventricular septal defect.

An Audible Shunt Murmur in Atrial Septal Defect

“…ASDs-systemic-to-pulmonary flow ratio greater than 2:1 [3]-and JT's murmur begins before P 2 (Fig. 1B), a tricuspid flow provenance is necessarily excluded.…”