Abstract
A 53-year-old man diagnosed and treated for hypertrophic obstructive cardiomyopathy received serial echocardiograms before and after dual-chamber pacemaker implantation. Varying the programmed atrioventricular delay in a dual-chamber pacemaker can affect the left ventricular outflow tract pressure gradient in hypertrophic obstructive cardiomyopathy. Serial Doppler echo examinations were used to evaluate the effect of varying atrioventricular intervals. Echocardiography can be effectively used with pacemaker programming to optimize the left ventricular outflow tract velocities in patients with hypertrophic obstructive cardiomyopathy.
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