Sustained uniform ventricular tachycardia is rare in hypertrophic cardiomyopathy and appears strongly associated with the presence of a left ventricular apical aneurysm.
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Sustained VT is rare in HCM; this case report leaves open whether apical aneurysm identifies a higher-risk subset needing validation.
Of 51 patients with hypertrophic cardiomyopathy who had episodes of ventricular tachycardia detected during ambulatory electrocardiographic monitoring only two had clinical sustained uniform ventricular tachycardia that required medical treatment because of worsening symptoms. In both patients the arrhythmia was associated with the uncommon finding of an apical aneurysm with angiographically normal coronary arteries.
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Alfonso et al. (1989) studied this question.
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