THE EFFECT OF PERCUTANEOUS CORONARY ARTERY INTERVENTION ON BODY SURFACE POTENTIAL MAPS

摘要

A quantitative body surface potential mapping (BSPM) parameter (the ratio of the highest maximum and lowest minimum potential during depolarization time: Max/Min), defined by our previous studies, indicates the electrical potential loss in the anterior (Max/Min<0.6) and posterior (Max/Min>1.25) region. Patients: forty-nine patients (34 m, 42-86 y, mean: 61) with ischemic heart disease but in stable state were examined and than revascularised by percutaneous coronary artery (LAD: 26, RC: 11, CX: 12) intervention (PCI). Method: Max/Min value was determined by BSPM (63-lead Montreal system) and its change before and 4-40 days after PCI was evaluated with one-sample student-t test. Results: Max/Min value was increased in LAD PCI (26+-33%, p<0,01) and it was decreased in RC PCI (31+-17%, p<0,02) and CX PCI (ll+-20%, NS). Consequences: The direction of the change of the Max/Min value indicated the increase of the electrical potential values in the anterior wall due to LAD PCI and in the posterior wall due to RC PCI. In case of CX PCI, this change depends on the anterolateral or posterolateral dominancy of the CX artery. The results indicate that the monitoring of this parameter may help us in the non-invasive diagnosis of re-stenosis of a given coronary artery.