Oct 1, 1989

Changes in morphology of the paced QRS complex related to pacemaker output

Pacing and Clinical Electrophysiology : PACE
L M van GelderC H Tielen


The influence of pacemaker output on the morphology of the paced QRS complex was studied from standard lead electrocardiograms in 69 patients with bipolar pacemakers. In 40 of the 69 patients (58%), there was a significant (P less than 0.001) change in electrical axis, from -75 degrees at the low output setting (2.7 V, 0.15 msec) to -67 degrees at the high output setting (8.1 V, 2.29 msec). In 30 patients, these changes were also associated with changes in the QRS morphology and in the T-wave. This phenomenon may be explained by additional stimulation from the proximal electrode at high output, thus altering the pattern of depolarization.

  • References1
  • Citations6


  • References1
  • Citations6


Mentioned in this Paper

Implantable Stimulation Electrodes
Science of Morphology
Artificial Cardiac Pacemaker
Specimen Type - Electrode
Cardiac Pacing, Artificial
Electrocardiographic Recorders
Low Cardiac Output

About this Paper

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