Possible Prediction of Coronary Angiographic Results with the Use of the Series of Body Surface Potential Mapping

Szűcs E, Medvegy M, Duray G, Bauernfeind T, Molnár F, Nadeau RA,  I. Préda
Semmelweis University, 2^nd Department of Cardiology, State Hospital of the Internal Affairs Budapest and Research Center, Sacré-Coeur Hospital, University of Montréal

The aim was to compare the results of the body surface potential mapping (BSPM) method with the results of the coronary angiography in acute coronary syndrome.

Methods: 119 patients (81 m, 38 w, 31-78 y /mean: 60/) were investigated with BSPM (Montreal system, 63 leads). Electrical potential losses could be detected and localized in 52 of 58 patients with proven non-Q wave myocardial infarction and in 43 of 61 patients with unstable angina.

Results: Damage in the upper-septal region was accompanied by proximal LAD (in all patients) and concomitant CD lesion (p<0.01). Damage in the middle septal region was the most frequently observed (46 cases) and could be attributed to LAD or CD lesion (p<0.001). However a concomitant anteroseptal-apical damage (25 cases) proved a LAD injury (p<0.01), and an inferior-apical damage (5 cases) indicated LAD + CD lesions (p<0.01). Anteroseptal-apical, anterior-paraseptal, anterosuperior-middle damages indicated LAD lesion (92%, p<0.001) and multiple vessel disease in 60%. An interesting finding: LAD lesion was observed in all anterosuperior-middle potential loss cases while non-distal CX lesion only led to damage in this area with concomitant LAD occlusion. Posterolateral damage indicated CX lesion in 79%. Inferobasal potential loss was accompanied by CD lesion (82%). Inferior-apical damage was predominantly due to multiple vessel disease (75%).

Conclusions: The information provided by BSPM can be regarded as a consequence of the coronary flow abnormalities. The preliminary results suggest, that BSPM, as a non invasive and unexpensive method, may play a role in the selection of patients for coronary angiography.