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A rare cause of fatal cardiac arrhythmia: Inhalation of butane gas. Pamuk U, Gürsu HA, Emeksiz S, Özdemir-Sahan Y, Çetin İ. A rare cause of fatal cardiac arrhythmia: Inhalation of butane gas. Turk J Pediatr 2018; 60: 755-756. Butane gas, especially available in lighters, is commonly misused among adolescents and its side effects are rarely observed but serious. A 14-yearold male was brought to our emergency department. The electrocardiographic (ECG) examination showed biphasic T waves in leads V4-V6, and long QTc at 481ms. Echocardiographic study showed left ventricular systolic dysfunction. Troponin I level was found to be high at 9.1 ng/ml. Taking into consideration the patient`s history, clinical and laboratory findings, ventricular fibrillation and myocardial injury resulting from butane gas inhalation was diagnosed.