ADDITIONAL PULMONARY VALVE CLOSURE CAUSED BY THE CATHETER AND DEMONSTRATED BY THE INTRACARDIAC PHONOCARDIOGRAM

Abstract

Intracardiac phonocardiographs were recorded from 30 un-selected cases of congenital and acquired heart disease. Additional diastolic sounds have been recorded from the pulmonary artery and right ventricular infundibulum. Both these sounds are related to the presence of the catheter through the pulmonary valve. It has been confirmed that the sound conventionally called P2 is caused by pulmonary valve closure.