A rare case with melatonin-induced on top of alcohol intoxication Brugada type 2 pattern.

Brugada syndrome (BrS), a genetically inherited ion channelopathy, has been linked to a considerable number of unexplained sudden cardiac deaths in patients without structural heart defects, and Brugada phenocopy (BrP) is a condition where there is an identical electrocardiogram (ECG) pattern to a congenital BrS, but this is due to other reversible etiologies. A 37-year-old male patient with a documented history of hypertension presented with vomiting after taking 43, 10 mg, melatonin pills and binge drinking locally made alcohol 2 days before. ECG showed right ventricular conduction delay with a "saddleback" appearance, with the J point elevated more than 2 mm and the terminal portion of the ST-segment elevated more than 1 mm in leads V1 and/or V2. Which returned to normal after a few hours. The association between the use of melatonin and the finding of the Brugada pattern (BP) in a patient with normal heart structure or abnormal ECGs has been documented in much literature, and although no official melatonin dosage is recommended for adults, melatonin has been reported to cause and protect from arrhythmias through different mechanisms. In our patient, after alcohol intoxication was ruled out as a cause, melatonin was the only significant risk factor related to his ECG findings. The BP can be found in patients with otherwise normal heart structure and ECG records, and an overdose of melatonin, which is used as an over-the-counter sleep medication, was found to be a possible cause of finding this pattern in these patients after excluding other known causes.