Electrophysiological Properties of a New Permanent Endocardial Lead for Uni- and Bipolar Pacing

Autor: Kjell Breivik, Hogne Engedal, Ole-Jørgen Ohm
Rok vydání: 1982
Předmět:
Zdroj: Pacing and Clinical Electrophysiology. 5:268-274
ISSN: 1540-8159
0147-8389
DOI: 10.1111/j.1540-8159.1982.tb02224.x
Popis: BRElVIK, K., ENGEDAL, H., and OHM, O.-J.; Ehctropbysiological properties of a new permanent endocardial lead for uni- and bipolar pacing. Unipolar and bipolar electrode systems were compared for electrogram amplitudes and slew rates, signal source impedance, and myocardial stimulation threshold and resistance in 15 consecutive patients who received a new endocardial electrode (Cordis 325–161). The bipolar electrograms showed the highest amplitude in nine of the patients (60%). The unipolar and bipolar electrograms were equal in four patients (26.7%), whereas the unipolar electrograms were highest in only two patients (13.3%). The difference in mean amplitude between bipolar (11.1 mV) and unipolar (10.1 mV) electrograms was statistically significant (p 0.05). Mean slew rates were almost equal (1.7 versus 1.6 V/s; p > 0.1). The bipolar electrode system always gave somewhat higher signal source impedance than the unipolar system (p 0.001). The current threshold was significantly lower during bipolar pacing (0.59 mA) in constant current pacing mode, than during unipolar pacing (0.65 mA) (p < 0.05). No significant differences were found during constant voltage pacing. Stimulation resistance was highest in the bipolar electrode system (p < 0.001). We conclude that the bipolar eiectrode system is as good as, or better than, the unipolar system both for ventricular sensing and for pacing. (PACE, Vol. 5, March-April, 1982)
Databáze: OpenAIRE
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