Key result
A 62-year-old man with hypertrophic obstructive cardiomyopathy and infective endocarditis developed life-threatening complete atrioventricular block requiring surgical therapy and permanent pacing.
Case Report (n=1)
Complete AV block is a rare but life-threatening complication in HOCM, and pre-existing conduction disturbances should be recognized as a warning sign.
Supports vigilance for complete AV block in HOCM with endocarditis; hypothesis-generating regarding pre-existing conduction disturbances.
A 62-year-old man with hypertrophic obstructive cardiomyopathy (HOCM) had complete atrioventricular (AV) block and subsequent cardiac standstill. A previous electrocardiogram revealed a bifascicular block pattern. Because he also suffered from infective endocarditis of the native aortic valve, surgical therapy (dual-chamber permanent pacing, myectomy of the left ventricular outflow tract, and valve replacement) was performed. Complete AV block unrelated to a procedure is a rare complication in patients with HOCM, but it may be life-threatening. Therefore, a pre-existing cardiac conduction disturbance should be specifically recognized as the aura of a higher degree of AV block.
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Katayama et al. (2012) conducted a case report in Hypertrophic obstructive cardiomyopathy with complete AV block and infective endocarditis (n=1). Surgical therapy (dual-chamber permanent pacing, myectomy, and valve replacement) was evaluated. A 62-year-old man with hypertrophic obstructive cardiomyopathy and infective endocarditis developed life-threatening complete atrioventricular block requiring surgical therapy and permanent pacing.
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