ANALYSIS OF HIGH-RESOLUTION ECG-CHANGES DURING PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY

The authors have hypothesized that low-level, electrocardiographic cha nges may accompany transient ischemia induced by percutaneous translum inal coronary angioplasty. Altered repolarization may manifest as subc linical changes in ST-T morphology. Changes in depolarization may mani fest as low-amplitude notches and slurs, a phenomenon the authors term abnormal intra-QRS potentials. The initial aim of this study was to c haracterize changes in high-resolution electrocardiograph signals that might be linked to ischemic involvement of the ventricular myocardium .