title: Acute cannabis intoxication mimicking brugada-like ST segment abnormalities.
abstract: A 19 years old male presented with a syncopeal episode after heavy marihuana use. A 12 lead ECG demonstrated Brugada-like ST segment elevation in leads V1 and V2. Urine and blood toxicological studies upon admission demonstrated markedly elevated levels of Tetrahydrocannabinol (THC). A 2D echocardiogram demonstrated normal left ventricular function without the presence of any structural or valvular abnormalities. The ST segments normalized once the acute intoxication resolved. A Procainamide induction test was performed without recurrence of the Brugada-like ST segment abnormalities. Our case exemplifies an otherwise healthy male with a negative work-up for a vasovagal mediated syncope and isolated ST segment changes due to THC. The arrhythmic properties of THC have been related to its effect on action potential shortening and vagal tone hyper-stimulation. The ST segment abnormalities are believed to be related to partial sodium channel agonist activity.
authors.forename: Marcos
authors.initials: M
authors.lastname: Daccarett
authors.forename: Mouhanad
authors.initials: M
authors.lastname: Freih
authors.forename: Christian
authors.initials: C
authors.lastname: Machado
mesh_terms: D000328:Adult; D053840:Brugada Syndrome / Q000175:diagnosis; D002188:Cannabis / Q000506:poisoning*; D003937:Diagnosis, Differential; D004452:Echocardiography; D004562:Electrocardiography; D006801:Humans; D008297:Male; D011041:Poisoning / Q000175:diagnosis* / Q000503:physiopathology