OPTIMAL LEAD SYSTEM FOR ELECTROCARDIOGRAP HIC MAPPING

A system of leads for electrocardiographic mapping has been suggested. The system provides sufficient accuracy of clinical mapping of the el ectric potential of the heart over the total surface of the chest with a number of electrodes close to possible minimum. Design of the maps of cardiac potential has been performed according to origibal techniqu e of adaptive quasimultipolar approximation of the potential. Experime ntal measurements in 100 healthy men and 25 patients with different ca rdiac pathology were conducted for assessment of accuracy of mapping o f the cardiac potential using two Variants of the lead system - with 3 2 and 48 chest electrodes. The results were compared with the data obt ained by the reference CARDIAC lead system which consists of 80 chest electrodes. For the 48 electrode system absolute root-mean-square erro r of the potential average for the group when constant standard geomet ric parameters of the chest were used in calculations was about 7 !m!V for P region, about 33 !m!V for the QRS region, and about 11 !m!V for the T region of the electrocardiogarm. These errors which were close to the level of unavoidable noise of a measuring procedure in clinical conditions could be further diminished by inclusion into calculations of individual geometric parameters of the chest.