[Ventricular rhythms with normal heart rate in the acute stage of myocardial infarction]

In relation with 25 personal cases, a general review of ventricular rhythms with normal rate observed during the acute stage of myocardial infarction is undertaken. More commonly called "slow VT", this transient and benign arrhythmia occurs within the first 48 hours of infarction. Presence of numerous fusion beats and His potential recordings make it possible to demonstrate its ventricular origin. Its mechanism is variable: in most cases it results from the discharge of an automatic, non-parasystolic, intermittently active focus, more rarely from the discharge of a parasytolic focus and in many cases, the focus is not apparent. Treatment of this arrhythmia should be careful: its benign character often justifies therapeutic abstention.