The Analysis of the Right Ventricular Endocardial Electrogram in pacemaker Implantation.

Abstract

During the pacemaker implantation and puls generator replacement, unipolar right ventricular electrograms were recorded from 26 patient (24 at implantation and 6 at puls generator replacement). The mean voltage was 7, 5 7 my in initial implantations. The chronic voltage amplitude is 11 percent lower than that of acute electrogram.
There was a direct correlation between surface area of the electrodes and the Q RS potentials measured. With the present trend toward utilization of small surface area electrodes to reduce pacemaker cell draine, care must be taken to avoid the sensing problems.