Late relapse myoclonus in a case of Lance-Adams syndrome.

A 66-year-old man had a history of an anterior myocardial infarction followed by a successful cardiopulmonary resuscitation and a posthypoxic myoclonus, also known as Lance-Adams syndrome (LAS). Eight years ago, he was admitted to the emergency department with the same myoclonic jerks during an intercurrent respiratory infection. After treatment with clonazepam and resolution of the infection, the myoclonus promptly disappeared. This case report suggests that relapses of successfully treated LAS can occur in vulnerable patients, as it's a chronic form of myoclonus.