Heart failure from unexplained cardiomyopathy.

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Abstract
The findings on clinical examination and at necropsy in 12 patients who died of primary myocardial disease of obscure origin are presented. All developed congestive heart failure, and 10 died less than 2 years after the development of symptoms. In 4 there was a family history of heart disease, and in 2 of these records are presented to show that the heart disease of other members was of similar type. In 1 patient an infective origin is postulated, and another is considered to be an example of asymmetrical hypertrophy. The other 10 are of unknown etiology. Those with a family history are compared with the others and no clear differences are found.