[Occurrence of a hyperactive carotid sinus in myocardial infarction (author's transl)].

In 41 patients with acute myocardial infarction, carotid sinus message was performed during the first 48 hours and again 4 weeks later. A hyperactive carotid sinus reflex was found in 12 cases (29.3%) in the first post-infarction day, only in 4 cases (9.8%) 4 weeks later. Hyperactive carotid sinus reflexes occurred four times more in inferior wall than in anterior wall infarction. Myocardial necrosis seems to be able to provoke an hyperactive carotid sinus reflex.