Hypertrophic cardiomyopathy in a patient with secondary hypoparathyroidism: A case report.

Parathyroid hormone (PTH) has direct and indirect actions on cardiovascular cells. The effects of chronic hypoparathyroidism on cardiac morphology, function, and conduction are still unclear. Low PTH states are associated with multiple manifestations in the heart, acute or chronic. Acute hypocalcemic cardiomyopathy is a transient dilated cardiomyopathy with reduced ejection fraction and diffuse left ventricular hypokinesia. Chronic hypoparathyroidism-associated cardiomyopathy is a rare disease that may cause reduced myocardial tension, cardiac cavity enlargement, arrhythmias, and congestive heart failure. Here, we describe a 73-year-old woman with chronic hypoparathyroidism and hypocalcemia, who developed a hypertrophic cardiomyopathy, and not a dilated hypocalcemia-associated cardiomyopathy, which would be usually the case.