[Endocavitary electric exploration in the study of auricular dysrhythmias].

His bundle recording combined with atrial pacing permit to evaluate atrio-ventricular conduction and the function of the sinus node by measuring the corrected sinus recovering time (CSRT). Three groups of 10 patients are included in this study: -- Group I is composed of control patients; the CSRT varies between 30 and 450 msec (mean value : 320 msec +/- 123.3).