system for mapping and ablation of endocardium

摘要

An accessory pathway detecting apparatus measures action potentials from first and second electrode leads (1,5), and outputs the obtained action potentials, as potential maps, to a CRT (46) or a printer (47) such that the action potentials can be displayed in the form of a list. An ablation catheter (70) is inserted and located at a preexcitation portion obtained from the display, and the impedance between each of the electrodes (L1 to L12, R1 to R12) of the first and second electrode leads (1,5) and the electrode (74) of the ablation catheter (70) is measured by an impedance measuring circuit (52). A point where the lowest impedance is measured is regarded as an accessory pathway portion. The ablation catheter (70) is fixed at this point. IMAGE