Video 42.15 View from the apex toward the left-sided atrioventricular (AV) valve, from a transthoracic echo
View from the apex toward the left-sided atrioventricular (AV) valve, from a transthoracic echo. On the left side, a normal mitral valve is shown. On the right side, a left-sided AV valve in an AVSD. Note that in an AVSD, the “cleft” is formed by the commissure between the anterior and posterior bridging leaflet. The direction is from the left toward the interventricular septum.