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[Acute pacing parameters of endocardial ventricular leads: comparison of two electrode designs]
Jakub Machejek1, Jacek Lelakowski, Jacek Bednarek
1Oddział Elektrokardiologii, Krakowski Szpital Specjalistyczny im. Jana Pawła II, Kraków. mcmachej@cyf-kr.edu.pl
Background:
Active-fixation pacemaker leads seem to have advantages over passive-fixation ones, such as the possibility of pacing at various sites, low dislodgement rate, and they are easier to extract. Unexpectedly their popularity in European countries is not high.
Aim:
The comparative estimation of acute electrical parameters between high-impedance fractal passive-fixation and traditional active-fixation leads. Second aim of the study was the evaluation of commonly used active- and passive-fixation leads in order to find the best solution for ambulatory implantation.
Methods:
35 patients received passive-fixation Biotronik Synox SX60BP pacemaker leads and 35 patients received active-fixation Biotronik YP60BP pacemaker leads. Intraoperative measurement of pacing threshold, impedance, R amplitude, and slew-rate were performed.
Results:
The pacing threshold was statistically significant lower (p = 0.1) in passive-fixation "tined-tip" SX60BP group (0.45 vs. 0.63). In 3 active-fixation cases "exit block" with ineffective pacing occured in early post-operative period.
Conclusion:
Active-fixation YP60BP electrodes should not be used for ambulatory implantation course.
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