Effectiveness of epicardial atrial pacing using a bipolar steroid-eluting endocardial lead with active fixation in an experimental model
Acta cir. bras
;
28(7): 543-550, July 2013. ilus, graf, tab
Article
in English
| LILACS
| ID: lil-679088
ABSTRACT
PURPOSE:
To assess the effectiveness of bipolar epicardial atrial pacing using an active fixation bipolar endocardial lead implanted on the atrial surface in an experimental model.METHODS:
A total of ten Large White adult pigs underwent pacemaker implantation under general anesthesia. Atrial pacing and sensing parameters were obtained at the procedure, immediate postoperative period and on the 7th and the 30th postoperative in unipolar and bipolar configurations.RESULTS:
All procedures were successfully performed. There were no perioperative complications and no early deaths. Atrial pacing and sensing parameters for both unipolar and bipolar modes remained stable throughout the study. We observed a progressive increase in atrial thresholds, ranging from 0.49 ± 0.35 (at implantation) to 1.86 ± 1.31 volts (30th postoperative day), in unipolar mode. Atrial impedance measurements decreased slightly over time, ranging from 486.80 ± 126.35 Ohms (at implantation) to 385.0 ± 80.52 Ohms (30th postoperative day). Atrial sensing measures remained stable from the immediate postoperative period until the end of the study.CONCLUSION:
The bipolar active fixation endocardial lead implanted epicardially can provide stable conditions of pacing and sensing parameters throughout the postoperative follow-up.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Pacemaker, Artificial
/
Steroids
/
Cardiac Pacing, Artificial
/
Electrodes, Implanted
/
Equipment Design
/
Heart Atria
Type of study:
Evaluation studies
/
Prognostic study
Limits:
Animals
Language:
English
Journal:
Acta cir. bras
Journal subject:
General Surgery
/
Procedimentos Cir£rgicos Operat¢rios
Year:
2013
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
USP/BR
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