Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 16 3 2021 07 15 119 122 EN Muhammet Uyanik Department of Cardiology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey. Omer Gedikli Department of Cardiology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey. Ufuk Yildirim Department of Cardiology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey. 2021 03 12 2021 10 30 The basic components of energy drinks include caffeine, guarana, taurine, ginseng, and sugar. The excessive consumption of energy drinks has been associated with cardiovascular events such as tachycardia and myocardial infarction in the literature. We herein describe a 24-year-old man admitted to the emergency department. The patient’s medical history and family history were unremarkable. It was, however, learned that he had consumed 8 to 10 cans of energy drinks per day (3.5–4 Lit/d) in the 2-week period leading to the hospital admission. Physical examination revealed bilateral diffuse rales and 2+ pretibial edema. Echocardiography showed a left ventricular ejection fraction of 25% with global left ventricular hypokinesia and dilated left ventricular dimensions. Coronary angiography demonstrated normal coronary arteries. On cardiac magnetic resonance imaging, the left ventricle was dilated, and the systolic function was reduced. No pathological enhancement was observed. This case report and many previous studies support a possible link between caffeinated energy drinks and cardiovascular events. https://rhythm.tums.ac.ir/index.php/jthc/article/view/1434 https://rhythm.tums.ac.ir/index.php/jthc/article/download/1434/977