• Inês Rangel, Gustavo Barbosa, Carla de Sousa, Pedro Bernardo Almeida, Manuel Campelo, Teresa Pinho, and M Júlia Maciel.
• Serviço de Cardiologia, Hospital de S. João, Porto, Portugal. inesrang@gmail.com
• Rev Port Cardiol. 2012 Jan 1; 31 (1): 39-41.

AbstractCalcium plays a key role in heart muscle contraction and relaxation. Hypocalcemic heart failure is a rare and potentially reversible disturbance, which reflects this intrinsic relationship. The authors present the case of a 35-year-old woman who developed acute heart failure during the early postoperative period following total thyroidectomy. The echocardiogram showed severe global left ventricular dysfunction. Laboratory tests showed severe hypocalcemia and new-onset hypoparathyroidism. Cardiac catheterization showed angiographically normal coronary arteries. After clinical, hemodynamic and metabolic stabilization, a repeat echocardiogram revealed recovery of left ventricular function. Subsequently, cardiac magnetic resonance imaging was performed, which also showed no alterations. The patient was discharged asymptomatic, medicated with calcium carbonate, calcitriol and levothyroxine. This case highlights the importance of considering hypocalcemia as a cause of reversible myocardial dysfunction.Copyright © 2010 Sociedade Portuguesa de Cardiologia. Published by Elsevier España. All rights reserved.

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