Quinidine-induced torsade de pointes suppressed by paroxysmal atrial fibrillation.
A 74-year-old patient is presented in whom quinidine-induced torsade de pointes was abolished by the onset of atrial fibrillation with a fast ventricular response. Heart rate acceleration during atrial fibrillation shortened the Q-T interval from 0.68 on admission to 0.44 milliseconds when sinus rhythm was re-established. This resulted in the suppression of paroxysms of polymorphous ventricular tachycardia.
D000368:Aged; D001281:Atrial Fibrillation / Q000503:physiopathology*; D004562:Electrocardiography; D006801:Humans; D011802:Quinidine / Q000009:adverse effects*; D013610:Tachycardia / Q000139:chemically induced* / Q000503:physiopathology
D011802:Quinidine