1 Department of Pathology, University of Otago Medical School, Dunedin, New Zealand
Cardiac conducting tissue from the hearts of 40 victims of sudden infant death syndrome was examined microscopically by serial section. In five hearts there was marked narrowing of the major artery supplying the atrioventricular node. In another there was similar narrowing of the artery supplying the sinus node. The arterial lesions were focal and characterized by cellular intimal thickening which severely narrowed the vessel lumen. This arterial anomaly may be a contributory factor in the pathogenesis of some cases of sudden infant death.
Submitted on October 24, 1980
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