We would like to draw your reader’s attention to this novel (and completely inadvertent) method of superventricular tachycardia (SVT) cardioversion. We could find no previous reference to this having been reported in the literature before,1 and it raises the question, does the effectiveness of standard vagal manoeuvres increase after the administration of anti-arrhythmic drugs?

Our case involves a 72-year-old man, 2 days after anterior myocardial infarction on the coronary care unit. He developed an SVT that was resistant to cardioversion …