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The management of asymptomatic patients with severe aortic stenosis (AS) is controversial. Patients meeting standard echocardiographic criteria for severe stenosis have a variety of pressure gradients and flow rates that can be divided into four categories based on normal flow vs low flow (NF vs LF) and low gradient vs high gradient (LG vs HG), where LF is defined as a stroke volume index (SVI) of < 35 mL/m2 and LG is a mean gradient < 40 mmHg.

Asymptomatic Severe Aortic Stenosis

March 1, 2012

The management of asymptomatic patients with severe aortic stenosis (AS) is controversial. Patients meeting standard echocardiographic criteria for severe stenosis have a variety of pressure gradients and flow rates that can be divided into four categories based on normal flow vs low flow (NF vs LF) and low gradient vs high gradient (LG vs HG), where LF is defined as a stroke volume index (SVI) of < 35 mL/m2 and LG is a mean gradient < 40 mmHg.