Comparison of the ST-40 ms isointegral maps prior to and after aortocoronary revascularisation

In the prospective study the authors tested the hypothesis that successful aortocoronary by-pass procedure performed in reversible ischemic areas of the cardiac muscle can be documented by the study of ST-40 ms isointegral maps prior and after aortocoronary revascularization with the combination of dipyridamole stress testing. Eight patients (1 female), age from 47 to 72 years were included in the study. The patients with conduction and rhythm disturbances, left main stenosis, and/or unstable angina pectoris were excluded from the study. The body surface potentials were recorded in lying position with unipolar leads referenced to the Wilson central terminal with 32 electrodes (Ag-AgCl disks). Ten seconds intervals of 32 lead ECG were recorded before dipyridamole infusion and 10 minutes after it, both prior and after the operation. J point was determined and ST-40 ms isointegral maps were calculated and compared.