METHOD AND DEVICE FOR EVALUATION OF MYOCARDIAL ISCHEMIA BASED ON CURRENT DENSITY MAPS

摘要

Invention includes performing MCG examination, reconstructing cur¬ rent density vector maps, calculating vectors lengths for each map during cardiocycle intervals ST-T and QRS. Vector directions are divided onto 3 angular sectors within ST-T and 4 sub-intervals of QRS complex including depolarization of inter-ventricular septum (1 ), anterior wall and apex of LV (2), LV side wall (3), basal myocardial regions (4). Next, they were calculated total vector lengths, directed into the normal (LNORM), abnormal (LPATH), medium (LIM) sector, instantaneous abnormality index AI=100xLNORM/(LNORM+LPATH+1/2xLIM) and its mean-average value Alave for each of said intervals. Finally, for said regions 1-4 decision are made about absence/presence of insignificant/significant ischemia if Alave are within range 70≤Alave≤100 (40≤Alave70, 0≤Alave40). Device performs at least one method stage, comprises at least one electronic unit which may include embedded microprocessor, or at least one said step is performed by software.