
emergency medicine | echocardiography | #POCUS | #EchoFirst | tweets by @DrJonoHenry
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ALT (A) Patient positioning, selecting sector probe, place to obtain A5C and its schematic description. (B) Obtaining obstruction using color doppler imaging – flow acceleration/turbulence in LVOT (B1), mitral regurgitation (B2). (C) Obtaining obstruction using CW doppler – differentiation between ‘parabolic waveform’ in Aortic Stenosis and ‘dagger shape’ in LVOTO (C1). (D) Measurement of pressure gradient using the simplified Bernoulli equation (D1). (E) Detection of aliasing in LVOTO – the velocity exceeds the Nyquist limit (E1). (F) Subsequently establishing the level of obstruction using PW Doppler – from the apex through mid-ventricular (F1-F3), with maximum flow velocity in the narrowest part of the left ventricular cavity (F2). (G) Distinguishing Mitral Regurgitation from LVOTO by interpreting details of waveform assessment (G1).








