1. A method of identifying the location of an occlusion of a culprit coronary artery associated with an ischemic event by means of an n-lead ECG system comprising: receiving ECG signals of the n-leads; analyzing the ECG lead signals for ST elevation; calculating a plurality of ECG measurements which are useful in the classification of a culprit coronary artery and the location of its occlusion; using the ECG measurements to develop a classifier of the probability of the location of an occlusion in different coronary artery locations; operating the classifier to identify a location with the highest probability of an occlusion; and identifying to a user a specific coronary artery location which is likely to be the site of an occlusion.