Patients With Non-ST-segment Elevation Acute Coronary Syndrome

There are two types of acute coronary syndrome (ACS): ACS with persistent ST segment elevation (ACS ST +) and ACS without ST segment elevation (non-ST + ACS). The incidence of non-ST + ACS is increasing and currently accounts for the majority of myocardial infarction (MI) hospitalizations, while that of ST + ACS is declining. Complications of MI, which include rhythm and conduction disturbances, are mainly associated with ACS ST +. It is recognized that these complications can occur during non-ST + ACS, but with less frequency. This frequency is not clearly established, and has been the subject of few studies. Recent studies in this direction suggest that the frequency of rhythmic complications is low during non-ST + ACS. However, the data collected concerns inter-hospital transport. The aim of the study is to estimate the frequency of occurrence of potentially fatal rhythmic complications in patients admitted to the emergency room and to the cardiology department for non-ST + ACS.