Aortic Valve Area Calculator

AVA estimates are crucial in the diagnosis of aortic stenosis and its severity, along with the measurement of transvalvular flow and the determination of the magnitude and duration of the transvalvular pressure gradient.

In adult individuals with normal aortic valves, the valve area is 3.0 to 4.0 cm2. Complete assessment of the degree of aortic stenosis requires:
●Measurement of the transvalvular flow
●Determination of the magnitude and duration of the transvalvular pressure gradient
●Calculation of the aortic valve area

Severity	Mild	Mod	Severe
MeanAVG (mmHg)*	< 25	25-40	40″}”>> 40
Mean AVG (mmHg)**	< 30	30-50	50″}”>> 50
Vmax (m/sec)	2.6-3.0	3.0-4.0	4.0″}”>> 4.0
AVA (cm2)	1.5″}”>> 1.5	1.0-1.5	< 1.0
Indexed AVA (cm2/m2)	0.85″}”>> 0.85	0.60-0.85	< 0.6
Velocity Ratio	< 2	2-4	4″}”>> 4