Rapid high resolution electroanatomical mapping: evaluation of a new system in a canine atrial linear lesion model.

摘要: Background— A canine right atrial (RA) linear lesion model was used to produce a complex pattern of RA activation evaluate novel mapping system for rapid, high resolution (HR) electroanatomical mapping. Methods and Results— The (Rhythmia Medical, Incorporated) uses an 8F deflectable catheter with minibasket (1.8 cm diameter), containing 8 splines electrodes (total 64 electrodes, 2.5 mm spacing). automatically acquires electrograms location information based on electrogram stability respiration phase. In 10 anesthetized dogs, HR-RA map obtained by maneuvering the during sinus rhythm coronary pacing. thoracotomy performed, either 1 or 2 (to create gap) epicardial lesions were created free wall (surgical incision radiofrequency lesions). maps pacing close obtained. total 73 created, 44 729 (median 237) beats 833 12 412 3589) (≤2 ≤5 from surface geometry), 1.8 5.3 2.7) mm, 2.6 26.3 7.3) minutes time. Without manual annotation, accurately geometry demonstrated activation, identifying lines block presence absence gap in all dogs. Endocardial ablation (guided map) produced complete across 3 dogs tested. Conclusions— new HR quickly identifies patterns RA, little no annotation