Aortic Valve Flashcards
What is the cut off for valve area for severe aortic stenosis
<1.0 cm2 or <0.6 cm2/m2
What is the cut off for valve area for moderate aortic stenosis
1.0-1.5 cm2 or 0.6-0.85 cm2/m2
What is the cut off for valve area for mild aortic stenosis?
> 1.5 cm2 or >0.85 cm2/m2
Range for mean pressure gradient for moderate aortic stenosis
30-40 mmHg
Cut off for mean pressure gradient for severe AS
> 40 mmHg
What is the mean pressure gradient for mild AS?
<30 mmHg
What is the peak pressure cut off for severe AS?
> 64 mmHg
What is the range for moderate aortic stenosis for peak pressure?
40-64 mmHg
Mild aortic stenosis peak pressure cut off?
<40 mmHg
Dimmensionless index ratio for severe aortic stenosis?
<0.25
Dimmensionless index ratio for moderate aortic stenosis?
0.25-0.5
Dimmensionless index ratio for mild aortic stenosis?
> 0.5
What is the AI jet:LVOT diameter ratio for mild AI?
<25%
What is the AI jet:LVOT diameter ratio for moderate AI?
25-64%
What is the AI jet:LVOT diameter ratio for severe AI?
> 65%
What is the AI jet:LVOT area ratio for mild AI?
<5%
What is the AI jet:LVOT area ratio for moderate AI?
5-59%
What is the AI jet:LVOT area ratio for severe AI?
> 60%
Vena contracta cut off for severe AI?
> 6mm
Pressure half time cut off for mild AI?
> 500 ms
Pressure half time cut off for moderate AI?
200-500 ms
Pressure half time cut off for severe AI
<200 ms
What is the EROA cut off for mild AI?
<0.1 cm2
What is the EROA cut off for moderate AI?
0.1-0.3 cm2
