Clarithromycin-induced QT prolongation in a patient with incidental parathyroidectomyKutluturk, Faruka; Yuce, Suleymena; Ozeke, OzcanbCardiovascular Endocrinology: September 2014 - Volume 3 - Issue 3 - p 107–109 doi: 10.1097/XCE.0000000000000016 Case report Abstract Author Information Acquired long QT syndrome refers to a syndrome similar to the congenital form but caused by exposure to drugs that prolong the duration of the ventricular action potential. By far the most common cause of acquired long QT syndrome is drug induced, with antiarrhythmics being the group of drugs most commonly implicated. Apart from antiarrhythmics, many drugs capable of inducing QT prolongation are noncardiac and are used for relatively benign conditions. We report a case of QT prolongation in a patient with hypocalcemia secondary to hypoparathyroidism who received clarithromycin. The contributions of these factors to the prolonged QT interval are discussed. aDepartment of Endocrinology, Gaziosmanpasa University, Tokat bDepartment of Cardiology, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey Correspondence to Ozcan Ozeke, MD, Department of Cardiology, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara 06100, Turkey Tel: +90 505 383 67 73; fax: +90 312 3124120; e-mail: firstname.lastname@example.org Received August 31, 2013 Accepted October 29, 2013 Copyright © 2014 Wolters Kluwer Health, Inc. All rights reserved.