Abstract
There has been no quantative way to determine the optimal time setting of rate responsive (RR)mode after implantation of rate responsive pacemakers (RRPM). Recent progress of real time telemetry system applied to RRPM seems to make it possible to determine. By means of sequential measurement of initial voltage thresholds after pacemaker implants, it was evidenced that i) in uses of new endocardial leads, a week after implant is advisable for the setting of the RR mode, ii) in in cases of replacement of generators alone, a few days after implants is enough for the setting, iii) in cases of new myocardial leads, on the otber hand, more than two weeks seems to be necessary before setting of the RR mode. In conclusion, real time telemetry is an useful andnecessary system for decision of time setting of the RR mode.
