Comparison of 'electrophysiologic imaging' and radionuclide imaging in quantification of controlled cardiac ischemia

摘要

The objective of this study was to determine the utility of body-surface potential mapping (BSPM) in detecting, localizing and quantifying the extent/severity of acute myocardial ischemia during coronary occlusion. Percutaneous transluminal coronary angioplasty (PTCA) was used as a model of 'controlled' acute myocardial ischemia. We compared the ability of 'electrophysiologic imaging' (BSPM enhanced by inverse calculation of epicardial potentials) and radionuclide imaging to detect and quantify regional myocardial ischemia. All results were calculated from a polar display of the epicardium. The study group included 18 patients with single-vessel coronary artery disease. 'Electrophysiologic imaging' poses no risk for the patient and in this study correlates with radionuclide imaging as a method of detecting and localizing acute myocardial ischemia during PTCA.