Figure 1From: Perioperative risk stratification in non cardiac surgery: role of pharmacological stress echocardiographyUnivariate hazard ratio for intravenous dipyridamole-thalium-201 myocardial perfusion, dobutamine stress echocardiography and dipyridamole stress echocardiography for each of the published reports (redrawn and updated from [26]).Back to article page