Summary
A 30-year-old woman presented with lifethreatening ventricular tachycardia without overt heart disease. Ultrastructural investigation of endomyocardial biopsy disclosed abnormally structured and often enlarged mitochondria. Morphometry revealed the ratio of volume density of mitochondria to myofibrils to be markedly increased to 0.667 as compared with five controls (mean: 0.46; range: 0.445–0.479). Investigation of mitochondrial respiratory chain enzymes revealed a 90% reduction in activity of cytochromec oxidase. Our data suggest that mitochondrial cardiomyopathy may induce malignant ventricular arrhythmias.
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Dedicated to Professor Waldemar Hort on the occasion of his professor emeritus
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Schwartzkopff, B., Zierz, S., Frenzel, H. et al. Ultrastructural abnormalities of mitochondria and deficiency of myocardial cytochromec oxidase in a patient with ventricular tachycardia. Vichows Archiv A Pathol Anat 419, 63–68 (1991). https://doi.org/10.1007/BF01600154
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DOI: https://doi.org/10.1007/BF01600154