Aortic Valve & Aorta. Aortic Valve Area (AVA). Planimetry Planimetry is the tracing out of the opening of the aortic valve in a still image obtained during echocardiographic acquisition during ventricular systole Normal planimetry of the AoV should be 2.6-3.5cm2.
AVA= LVOT (A) X LVOT (TVI) / AV (TVI) (SIMPLIFIED)
Differences in doppler wave forms
LVOT diameter = 1.9 to 2.2 cm
Aortic Root Diameter 2.5 to 3.9 cm