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Case Reports in Medicine
Volume 2010, Article ID 976120, 4 pages
http://dx.doi.org/10.1155/2010/976120
Case Report

Life-Threatening Cardiac Manifestations of Pheochromocytoma

1Department of Clinical Cardiac Electrophysiology, Centro de Estudos em Arritmia Cardíaca, SMDB Conj. 16 Lote 5 Cs A, Brasilia-DF 71680-160, Brazil
2Federal University of São Paulo, Napoleão de Barros, São Paulo 04024-002, Brazil

Received 5 November 2009; Accepted 3 January 2010

Academic Editor: Grigorios Korosoglou

Copyright © 2010 Luiz R. Leite et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Pheochromocytoma is a catecholamine-secreting tumor of the adrenal glands, usually with benign manifestations, whose typical clinical presentation includes the triad of headache, palpitations and diaphoresis. However, a wide range of signs and symptoms may be present. In the cardiovascular system, the most common signs are labile hypertension and sinus tachycardia. Systolic heart failure and ST-segment deviations mimicking myocardial infarction have also been reported, as well as QT interval prolongation and, rarely, ventricular tachycardia. We describe a challenging diagnosis of pheochromocytoma with many cardiovascular manifestations, which could have been missed due to the absence of typical symptoms.