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The shape of Doppler velocity tracings in obstructive hypertrophic cardiomyopathy offers insights into its pathophysiology. Inflection points are the points on a curve where its shape changes from concave to convex, or vice versa. These dynamic systolic abnormalities are caused: 1) by the amplifying nature of the obstruction; and 2) by the adverse effect of the sudden imposition of afterload in midsystole...
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