Complications of chest thump for termination of supraventricular tachycardia in children.

We report on two cases of mechanical termination of supraventricular tachycardia by chest thump which were followed by serious complications. In a 3-year-old boy with an otherwise normal heart, incessant supraventricular tachycardia was converted to sinus rhythm by a single precordial thump. This, however was followed by thrombo-embolic infarction of the left-sided middle cerebral artery. In another case of a 9-year-old girl, recurrent episodes of supraventricular tachycardia were associated with Ebstein anomaly of the tricuspid valve. Chest thump was successful in terminating supraventricular tachycardia but induced a short run of ventricular tachycardia which terminated itself and was then followed by sinus rhythm. It is concluded that even a slight precordial thump implies undetermined risks in the acute management of supraventricular tachycardia in children and should therefore be abandoned in favour of other methods.