AP view 

The pressure in the left ventricle is higher than the right during sytole. This will result in left to right shunting across the VSD, throughout systole. The increased pulmonary blood flow will cause prominant pulmonary vasculature.

The right ventricle will become hypertrophied with moderate to large amount of shunt leading to cardiomegaly.

The left atrium will become dilated due to increase pulmonary venous blood return. In the AP view, this will be manifested by widening of the carinal angle since the left atrium is situated just below the right and left main bronchi as they bifurcate.

This view best demonstrates the left atrial dilatation. The dilated left atrium will cause the esophagus to dilate, as noted in this figure with Barium swallow.