Age-associated changes in left ventricular outflow tract geometry in normal subjects.

This study examined age-associated changes in the geometry of the left ventricular outflow tract in normal subjects using Doppler echocardiography. With advancing age, the angle between the interventricular septum and the aortic root became more acute and a discrete bulging of the proximal septum was more common, but neither finding appeared to affect resting outflow tract velocity or left ventricular mass significantly.