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Hypertrophic cardiomyopathy presenting before 2 years of age in 13 patients

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Summary

Thirteen patients with hypertrophic cardiomyopathy (HCM) who presented by 2 years of age were evaluated. All had been referred because of a heart murmur. Four had positive family histories for HCM and 2 had congestive heart failure. Cardiothoracic ratios ranged from 0.43 to 0.70 (mean 0.56). In 12 cases, electrocardiograms showed abnormal Q waves, ventricular hypertrophy, or aberrant rhythms. Resting peak systolic pressure differences ranged from 0 to 92 mm Hg (mean 21.1) across the right ventricular outflow tract, and from 0 to 112 mm Hg (mean 36) across the left ventricular outflow tract (LVOT). Cardiac angiography showed evidence of asymmetric septal hypertrophy (ASH) in all patients, LVOT obstruction in 3, and aortic and mitral insufficiency in 1. Six patients received no therapy, 6 were treated with propranolol, and 3 were treated with left ventricular myomectomy. During follow-up (mean 6.1 years), no patient died and 10 became or remained asymptomatic. The apparently favorable clinical course observed in these patients during this period of follow-up may be related to early treatment, made possible by the early diagnosis.

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Author information

Author notes

  1. Michael S. Schaffer M.D.

    Present address: Division of Cardiology, Cardinal Glennon Memorial Hospital for Children, 1465 South Grand Boulevard, 63104, St. Louis, Missouri

Authors and Affiliations

  1. Division of Cardiology, The Hospital for Sick Children, Toronto, Ontario, Canada

    Michael S. Schaffer M.D., Robert M. Freedom & Richard D. Rowe

  2. Department of Pediatrics, University of Toronto, Faculty of Medicine, Toronto, Ontario, Canada

    Michael S. Schaffer M.D., Robert M. Freedom & Richard D. Rowe

Authors
  1. Michael S. Schaffer M.D.
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  2. Robert M. Freedom
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  3. Richard D. Rowe
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Additional information

Supported in part by the Ontario Heart Foundation

Presented in part at the Canadian Cardiovascular Society Meeting, Montreal, Quebec, Canada, October 30, 1981

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Schaffer, M.S., Freedom, R.M. & Rowe, R.D. Hypertrophic cardiomyopathy presenting before 2 years of age in 13 patients. Pediatr Cardiol 4, 113–119 (1983). https://doi.org/10.1007/BF02076335

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