Sixty patients with acute myocardial infarction (AMI) and 40 control subjects were monitored for arrhythmias after swallowing 170 ml (6 fl oz) each of hot and cold water. In 16 AMI patients, slowing of cardiac rate or premature ventricular contractions developed after ingestion of hot water. In one patient, ventricular tachycardia appeared after both types of drinks. None of the control patients manifested arrhythmias. Ten of the 16 AMI patients were pretreated with 0.8 mg of atropine sulfate administered intravenously; no arrhythmias developed after drinking hot water. Patients with acute myocardial infarction should avoid hot beverages.
(JAMA 228:1021-1024, 1974)
Gross L, Malaya R. Extrinsically Induced Arrhythmia in Acute Myocardial Infarction. JAMA. 1974;228(8):1021–1024. doi:10.1001/jama.1974.03230330051022