Southwest Cardiothoracic Anaesthesia
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Transoesophageal Echo
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Aortic Stenosis
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Severity Grading
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Velocity ratio (LVOT:AV VTI) = DSI
Velocity ratio (LVOT:AV VTI) = DSI
Normal
n/a
Mild
>0.5
Moderate
0.25-0.5
Severe
<0.25