Epistemis

Aortic Valve Area (AVA) by Continuity Equation

The continuity equation is based on the physical principle of conservation of mass: the volume of flow passing through the left ventricular outflow tract (LVOT) must be equal to that passing through the aortic valve (AV):

Required inputs

The inputs this calculator asks for inside the app.
VariableExample value
LVOT diameter (cm)2.0
LVOT Peak Velocity (VLVOT) (m/s)1.0
Peak Aortic Valve Velocity (VAV) (m/s)4.0

Run the calculation in the app

This page explains the score but does not run it. In Epistemis, the calculator validates units, flags values outside physiological ranges, and provides the interpretation that a number alone cannot convey.

Epistemis is educational review material. It is not a medical device, does not diagnose or prescribe treatment, and does not replace formal medical training, current clinical guidelines, or professional clinical judgment.

PreviousCorrected QT Interval (QTc) - Bazett, Fridericia and Framingham
Specialty
Cardiology
Area
Internal Medicine
Variables
3
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