Transvascular endomyocardial biopsy in infants and small children. Myocardial findings in 10 cases of cardiomyopathy
Abstract
Transvascular endomyocardial biopsy specimens from nine children with congestive cardiomyopathy and one with hypertrophic cardiomyopathy were studied by light microscopy using sections 1 mu thick cut from Epon embedded tissue and by electron microscopy. There was a disparity between the severity of the physiologic impairment and the morphologic abnormalities. Interstitial fibrosis was present only in the one case in which significant viral antibody titers were obtained. The sizes of the cardiac muscle cells varied abnormally in all specimens. Cardiac muscle cells in two patients contained abnormal mitochondria, and a leptomeric fibril was found in one patient. Virologic cultures of the tissues were negative and no viral particles were identified by electron microscopy. An attempt was made to correlate the clinical and pathologic findings.
References
Light-cored dense particles in mitochondria of a patient with skeletal muscle and myocardial disease
Occurrence of intramitochondrial glycogen in canine myocardium after prolonged anoxic cardiac arrest
Two childhood myopathies with abnormal mitochondria. I. Megaconial myopathy. II. Pleoconial myopathy
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