The dependence of the STEMI classification on the position of ST-deviation measurement instant relative to the J point

Introduction. The electrocardiogram (ECG) is an important diagnostic tool in acute coronary syndrome (ACS). STEMI (ST Elevation Myocardial Infarction) is formally diagnosed by ST-deviations measured at the J point. However, due to uncertainty about the position and amplitude of the J point, ST deviations are often measured at a fixed-time interval after the J point. The impact of the position of the ST-deviation measurement on STEMI classification is not known and is the subject of the current study.