Why the study?
Does bipolar configuration compared to unipolar configuration improve selective atrial sensing in patients undergoing atrial electrode implantation?
Does bipolar configuration compared to unipolar configuration improve selective atrial sensing in patients undergoing atrial electrode implantation?
Bipolar pacing configurations may be preferable when selective atrial sensing is important due to smaller ventricular deflections compared to unipolar configurations.
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May support bipolar preference for selective atrial sensing; hypothesis-generating from single case report.
In order to explore fully the sensing characteristics of both bipolar and unipolar configurations of the tined right atrial appendage electrode, detailed electrographic analysis was performed in 10 patients undergoing atrial electrode implantation. Though no differences were noted between unipolar and bipolar atrial deflections in electrograms from these leads, the unipolar ventricular deflections were greater in both amplitude (1.9 vs 0.6 mV) and slew rate (0.17 vs 0.07). These data suggest that bipolar pacing configurations might be preferable when selective atrial sensing is important.
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Jerry C. Griffin (1983) studied this question.
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