Authors: AI Dipchand I Tein B Robinson LN Benson
Publish Date: 2014/04/30
Volume: 22, Issue: 1, Pages: 14-22
Abstract
In the past decade maternally inherited disorders have been described manifesting as hypertrophic cardiomyopathy These are primarily associated with defects in oxidative metabolism due to an alteration in mitochondrial DNA Although the biochemistry and molecular biology is welldefined there is little information regarding clinical presentation and course Reported manifestations can be broad and can include myopathy encephalopathy strokelike episodes hearing loss cardiomyopathy multiorgan dysfunction and sudden death Predominant or exclusive involvement of the heart is rare We report the clinical presentations investigations pathologic findings and clinical course in two families with two mitochondrial tRNA defects with exclusive cardiac involvement and demonstrable clinical heterogeneity based on the percentage of mutant tRNA
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