Abstract
(1) Exercise test was a simple method for differentiating physiological and pathological bradyarrhythmia. (2) Exercise test was useful for functional evaluation of the sinus node activity in SSS and of AV conduction in AVB, and for the determination of the site of subsidiary pace-maker in CHB. (3) Exercise test was of clinical significance for determining the indication of artificial pace-maker implantation in cases with bradyarrhyarrhythmias.