Abstract
Background
The use of quadripolar (QP) left ventricular leads for cardiac resynchronization therapy (CRT) is intended to improve outcomes compared with conventional bipolar leads (BP). Hence, the number of implanted quadripolar CRT systems is increasing despite limited long-term data.
Purpose
The aim of this study is to evaluate clinical response and long-term outcomes of CRT recipients who were implanted with quadripolar versus bipolar left ventricular leads.
Methods
Data from consecutive patients receiving a CRT defibrillator in one German and one Hungarian tertiary referral center were retrospectively collected. Long-term survival and response to CRT were analyzed.
Results
A total of 536 patients with structural heart disease and a mean left ventricular ejection fraction (LVEF) of 25% received a CRT defibrillator (CRT-D) system for primary (79%) or secondary (21%) prevention of sudden death. Comorbidities did not differ significantly between patients receiving a QP (n = 123) or a BP lead (n = 413). Procedure (101 vs. 120 min) and fluoroscopy times (14 vs. 20 min) were shorter in patients implanted with QP compared with BP (both p < 0.001). At 6 months follow-up, QP patients were more likely to respond to CRT measured as improvement in the New York Heart Association (NYHA) functional class (77% vs. 63%; p < 0.001). Use of QP left ventricle/left ventricular (LV) leads was associated with greater reduction in QRS duration compared with patients implanted with BP LV leads (− 21 ± 30 vs. − 8 ± 35 ms, p = 0.004). Mortality was not significantly different between patients with QP and patients with BP LV leads at a mean follow-up of 39 ± 31 months.
Conclusion
Implantation of quadripolar left ventricular leads was associated with better CRT response compared with bipolar left ventricular leads.
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Abbreviations
- ACE-inhibitor:
-
Angiotensin-converting-enzyme inhibitor
- ARB:
-
Angiotensin receptor blocker
- ASA:
-
Acetylsalicylacid
- BP:
-
Bipolar
- BiVPace:
-
Biventricular pacing percentage
- CAD:
-
Coronary artery disease
- CI:
-
Confidence interval
- CKD:
-
Chronic kidney disease (stage III KDIGO, GFR ≤ 59 ml/min)
- CRT:
-
Cardiac resynchronization therapy
- CRT-D:
-
Implantable cardioverter defibrillator with CRT
- FDA:
-
Federal drug association
- HR:
-
Hazard ratio
- ICD:
-
Implantable cardioverter defibrillator
- IRB:
-
Institutional review board
- LBBB:
-
Left bundle branch block
- LMWH:
-
Low-molecular-weight heparin
- LV:
-
Left ventricle/left ventricular
- LVEF:
-
Left ventricular ejection fraction
- LVEDD:
-
Left ventricular end diastolic diameter
- MRAs:
-
Mineralocorticoid receptor antagonists
- NOAC:
-
Non-VKA oral anticoagulant
- NYHA:
-
New York Heart Association functional classification
- PAD:
-
Peripheral artery disease
- QP:
-
Quadripolar
- SCD:
-
Sudden cardiac death
- SD:
-
Standard deviation
- VKA:
-
Vitamin K antagonist
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J. W. E. reports receiving consulting fees, travel support, and lecture fees from ZOLL Medical, travel grants from St. Jude Medical/Abbott, and lecture fees from Servier and is a fellow of the Boston Scientific Heart Rhythm fellowship program outside the submitted work.
M.V. reports receiving lecture/consulting fees from Bayer, BMS, Daiichi Sankyo, and Pfizer and support attending scientific meetings from Bayer, Daiichi-Sankyo, Egis, Pfizer, and SJM, outside the submitted work.
D. D. has nothing to disclose.
A. P. B. has nothing to disclose.
Z.B. has nothing to disclose.
P. B. has nothing to disclose.
G.Z.D. reports speakers’ bureau from Medtronic, Biotronik, SJM, and Johnson & Johnson outside the submitted work.
S.H.H. reports receiving consulting fees from Bayer, BI, Boston Scientific, BMS, Gilead, J&J, Medtronic, Pfizer, SJM, Sanofi-Aventis, ZOLL Medical, and Cardiome outside the submitted work.
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Erath, J.W., Vamos, M., Domokos, D. et al. Effects of implantation of quadripolar left ventricular leads on CRT response. J Interv Card Electrophysiol 55, 73–81 (2019). https://doi.org/10.1007/s10840-019-00545-8
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DOI: https://doi.org/10.1007/s10840-019-00545-8