ST segment elevation in acute myocardial ischemia ST segment elevations with straight (horizontal, upsloping or downsloping) or convex ST segment strongly suggest acute transmural ischemia (Figure 1 A). Concave ST segment elevations, on the other hand, are much less likely to be caused by ischemia (Figure 1 B). This is noted in both North American and European guidelines. However, a concave ST segment does not rule out ischemia, it merely reduces the probability of ischemia as the underlying cause. Concave ST segment elevations are actually very common in the population (discussed below). #Diagnosis #Cardiology #ECG #EKG #STEMI #STElevation #Ischemic #Patterns
