Oct 1, 1989

Cross-talk in bipolar pacemakers

Pacing and Clinical Electrophysiology : PACE
W J CombsT D Bennett


Investigation of dual chamber pacing and sensing interactions at high rates is becoming increasingly important with the advent of sensor driven dual chamber pacemakers. The present study was designed to investigate the pacemaker and lead interactions that will affect cross-talk during high rate atrial and ventricular pacing. The study was divided into two phases, phase one investigated the mechanisms of cross-talk using standard pacemaker circuitry and various electrode types in a canine model. In six dogs with complete heart block, dual chamber pacing was carried out with four lead types at increasing pacing rates, while output of the ventricular sense amplifier of a pacemaker breadboard was monitored. Ventricular sense amplifier output signals (n = 332) progressively increased from 31.5 +/- 18.3 mV at 100 ppm to 102 +/- 55 mV at 160 ppm. Smooth platinum-iridium and platinized leads were statistically different at higher pacing rates (P less than 0.05). This signal level is sufficient to lead to a ventricular sensing event. In a second phase of the study, the incidence of cross-talk at high pacing rates was studied in patients with implantable dual chamber bipolar pacemakers. In 166 clinical trials on 106 patients with the sam...Continue Reading

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  • References10
  • Citations9


Mentioned in this Paper

Implantable Stimulation Electrodes
AT 130
Congenital Heart Block
Electric Conductivity
Atrial Fibrillation
Holter Electrocardiography
Body Surface Area Formula for Dogs
Artificial Cardiac Pacemaker
Heart Ventricle

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