Follow up of the patients with lithium pacemakers by pacergram

-Evaluation of the lead impedance and battery voltage-

Abstract

Since April 1976, we have follow up the pacemaker patients by analysing their pacergrams.
For a voltage constant pacemaker, predicted battery voltage calculated by pacergram was nearly equal to actual one measured at the time of the generator replacement as far as the time constant of a patient had been remained within 0.3.
The time constant calculated by the pacergram was closely corresponding with the lead impedance obtained by telemetry (Pacesetter 221) and measured impedance at the time of replacement.