i

i



Diagram (left) and corresponding echocardiographic apical 4-chamber image (right) showing the right ventricular (RV) basal (RVD1) and mid cavity (RVD2) RV minor dimensions and the RV longitudinal dimension (RVD3). The transducer is adjusted to focus on the RV chamber, with the goal of maximizing RV chamber size. The RV free wall is better seen in this view, also facilitating measurements for fractional area change.