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- Title
Far-Field QRS Complex Sensing Via the Atrial Pacemaker Lead. II. Prevalence, Clinical Significance and Possibility of Intraoperative Prediction in DDD Pacing.
- Authors
Brandt, Johan; Fåhraeus, Thomas; Schüller, Hans
- Abstract
To study the prevalence and significance of far-field QRS complex sensing via unipolar atrial electrodes, we attempted to provoke this phenomenon postoperatively in 119 patients with DDD pacemakers. It occurred in 42 patients (35%), with different types of atrial electrodes. In 27 cases with documented far-field QRS complex sensing, selection of an adequate atrial amplifier sensitivity eliminated the problem; in the remaining 15 cases, other program adjustments were necessary. In all patients DDD pacing could be maintained, and no reoperations were required. In a retrospective analysis of a subgroup of 26 patients, all having received endocardial unipolar carbon tip electrodes in the right atrial appendage, the possibility of predicting subsequent far-field QRS complex sensing was studied. The occurrence thereof was not significantly related to patient age or sex, indication for pacing, or routinely obtained electrophysiological measurements. Potential far-field QRS complex sensing via the atrial electrode is significantly common in patients with DDD pacemakers. Patient characteristics and intraoperatively measured introatrial signal amplitudes are not useful in predicting the postoperative occurrence of the phenomenon. As a rule, it can be handled effectively by pulse generator reprogramming.
- Subjects
CARDIAC pacemakers; IMPLANTED cardiovascular instruments; PATIENTS; ELECTRODES; MEDICAL equipment; ARTIFICIAL implants
- Publication
Pacing & Clinical Electrophysiology, 1988, Vol 11, Issue 11, p1540
- ISSN
0147-8389
- Publication type
Article
- DOI
10.1111/j.1540-8159.1988.tb06271.x