Table 2Echo characteristics of aortic stenosis

Mild or no aortic stenosisSevere aortic stenosis
Area of effective orifice (cm2)>1<0.6
Velocity across valve (m/s)<3>4
Gradient of pressure drop (mm Hg)0–60>60

From: Chapter 4, Understanding the echocardiogram

Cover of Cardiology Explained
Cardiology Explained.
Ashley EA, Niebauer J.
London: Remedica; 2004.
Copyright © 2004, Remedica.

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