Effect of biventricular pacing on left ventricular outflow tract pressure gradient in a patient with hypertrophic cardiomyopathy and normal interventricular conduction |
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Authors: | Komsuoglu Baki Vural Ahmet Agacdiken Ayşen Ural Dilek |
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Institution: | Department of Cardiology, Kocaeli University Medical Faculty, Kocaeli, Turkey. |
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Abstract: | We report a case of hypertrophic obstructive cardiomyopathy (HOCM) that was markedly improved by biventricular pacing. A 55-year-old woman with HOCM presented with palpitation and presyncope. Electrophysiologic study revealed an atrioventricular nodal reentrant tachycardia. After radiofrequency catheter ablation, a Mobitz type II atrioventricular block developed and a permanent pacemaker implantation was decided. Cardiac catheterization showed a left ventricular outflow tract (LVOT) gradient of 130 mmHg. Right dual-chamber and atrial-synchronous left ventricular epicardial pacing failed to reduce the gradient. After biventricular pacing, LVOT gradient decreased to 20 mmHg. Biventricular pacing may be an alternative therapy for patients with HOCM. |
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Keywords: | biventricular pacing hypertrophic obstructive cardiomyopathy |
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