Evaluation of ischemic injury of the cardiac tissue by using the principal component analysis of an epicardial electrogram. - Algimantas Krisciukaitis; Mindaugas Tamosiunas; Povilas Jakuska; Romualdas Veteikis; Raimundas Lekas; Viktoras Saferis; Rimantas Benetis (Comput. Methods Programs Biomed., 2006)