Assessing Aortic Stenosis Severity in Dynamic Left Ventricular Outflow Obstruction Using Echo Doppler

Abstract

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  Use the MB equation in the context of tandem stenosis.
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  A multimodality approach is preferred in this complex hemodynamic situation.
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  HPRF Doppler with time-aligned velocities can assess AS severity in tandem stenosis.
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  The use of HPRF reduces aliasing at the cost of introducing some range ambiguity.
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  Continuity equation may be considered using the volumetric LVSV.

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