Intermediate
Technical
IVT
aortic valve gradient
The pressure difference across the aortic valve during systole, measured by echocardiography or catheterization.
Full Definition
The aortic valve gradient represents the pressure drop across the aortic valve as blood flows from the left ventricle to the aorta during systole. This measurement is crucial for assessing aortic stenosis severity and determining surgical intervention timing. Peak and mean gradients are typically reported, with mean gradients >40 mmHg generally indicating severe stenosis requiring intervention.
Usage
Usage note: Always specify whether referring to peak or mean gradient, as clinical significance differs.
In Context
- "The patient's mean aortic valve gradient of 45 mmHg confirmed severe aortic stenosis." — Surgical consultation report
- "Post-operative echocardiography showed a significant reduction in aortic valve gradient following valve replacement." — Post-operative note
Also known as
transaortic gradient
pressure gradient
Don't confuse with
aortic valve area
aortic impedance