Hyperthyroid-induced cardiomyopathy in an adolescent.

Introduction Although there is ample evidence of hyperthyroidism associated with heart failure in adults, few reports exist in the medical literature regarding children who experience thyrotoxic cardiomyopathy. In this report we describe an adolescent patient who presented for urgent care with vague symptoms of palpitations, headaches, lower-extremity swelling, and dyspnea on exertion and was found to have congestive heart failure (CHF) secondary to hyperthyroidism.