Aortic Valve Area Calculator

The aortic valve (AV) is a semilunar valve of the heart. The area of the aortic valve (AVA) is used for measuring the severity of the Aortic stenosis (AS). Measurements that are taken during echocardiography is used for the calculation of the AVA. Find the stroke volume (SV), cross sectional (CSA) and AVA by entering the left ventricular outflow tract (LVOT), velocity time integral (VTI).

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Formula:

Aortic Valve Area = LVOT diameter2 * 0.78540 * LVOT VTI / Aortic Valve VTI CSA = ( LVOT ) cm2 = 0.785 x LVOT Diameter SV = 0.785 x Diameter2 x VTI ( LVOT ) Where, LVOT = Left Verticular Outflow Tract VTI = Velocity Time Integral CSA = Cross Sectional Area SV = Stroke Volume

If the Aortic valve area is less than 1 centimeter square, then the risk for the aortic stenosis disorder is high.

Example

If LVOT is 1, LVOT (VTI) is 2 cm and aortic valve VTI is 3 cm
CSA = 0.785 x 1 = 0.785 cm2
SV = 0.785 * 12 * 2 = 1.570 cc
Aortic Valve Area = 12 * 0.78540 * 2/3 = 0.52 cm2
Hence, the risk for Aortic Stenosis is Severe.

Note :This statistics calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.

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