Aortic Stenosis - severity

Aortic Stenosis - severity

• • AVA = CO/SEP x HR/44.5 root of mean gradient

  • More precisely, the valve area should be indexed to the patient's size, since a valve area of 1 cm2 may not be significant in a small patient but may be very significant in a larger patient. Critical AS is present when the AVA index is less thean 0.45 cm2.