Aortic stenosis differential diagnosis

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Differential diagnosis

• Fixed subvalvular obstruction

Presence of subaortic membrane

May be difficult to visualise in 2D echocardiography

Presents in early adulthood

Valve is not stenotic, but doppler shows increased gradient.

Can be diagnosed with careful search using pulse wave doppler and colour flow mapping

• Dynamic subaortic obstruction

Occurs with hypertrophic cardiomyopathy(HOCM)

Other features of HCM

late peaking, triangular CW doppler

changes with provocative measures