Early ventricular fibrillation in the baboon: possible role of epicardial ST segment changes

The changes in epicardial ST segment and the severity of the infarct defined by the onset of primary ventricular fibrillation were monitored in baboons after ligation of the anterior descending coronary artery. Although an increase in the ratio of the total ST segment elevation over the maximal drop of isoelectric baseline appeared to precede the onset of ventricular fibrillation, further data is needed for establishing a clear relation between these parameters.