Tissue Doppler in myocardial ischemia

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Tissue Doppler in myocardial ischemia: Reduction in myocardial systolic velocity (Sa) can be noted within as short as fifteen seconds of myocardial ischemia. Lowering of both systolic velocities can be seen with ischemia (less than 7.5 centimeters per second). Em/ Am reversal can also occur with acute ischemia as a result of diastolic dysfunction.

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