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Lahiri SK, Hulsurkar MM, Wehrens XH. Cellular regeneration as a potential strategy to treat cardiac conduction disorders. J Clin Invest 2021; 131:e152185. [PMID: 34596049 PMCID: PMC8483745 DOI: 10.1172/jci152185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Loss of atrioventricular conduction system (AVCS) cells due to either inherited or acquired deficits leads to conduction diseases, which can deteriorate into fatal cardiac arrhythmias and sudden death. In this issue of the JCI, Wang et al. constructed a mouse model of atrioventricular block (AVB) by inducing AVCS cell-specific injury using the Cx30.2 enhancer to drive expression of diphtheria toxin fragment A. AVCS cell ablation in adult mice led to irreversible AVB. jkjkIn contrast, AVCS cell injury in neonatal mice was followed by spontaneous recovery in a subset of mice, revealing a limited postnatal time window during which the regeneration of AVCS cells can occur as a result of cellular plasticity. This exciting study paves the way for future research into biological or cellular treatment approaches for cardiac conduction diseases by exploiting the regenerative potential of AVCS cells.
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Affiliation(s)
- Satadru K. Lahiri
- Cardiovascular Research Institute
- Department of Molecular Physiology and Biophysics
| | - Mohit M. Hulsurkar
- Cardiovascular Research Institute
- Department of Molecular Physiology and Biophysics
| | - Xander H.T. Wehrens
- Cardiovascular Research Institute
- Department of Molecular Physiology and Biophysics
- Department of Medicine (Cardiology)
- Department of Neuroscience
- Department of Pediatrics (Cardiology), and
- Center for Space Medicine, Baylor College of Medicine, Houston, Texas, USA
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Ravaux JM, Di Mauro M, Vernooy K, Van't Hof AW, Veenstra L, Kats S, Maessen JG, Lorusso R. One-year pacing dependency after pacemaker implantation in patients undergoing transcatheter aortic valve implantation: Systematic review and meta-analysis. JTCVS OPEN 2021; 6:41-55.e15. [PMID: 36003550 PMCID: PMC9390410 DOI: 10.1016/j.xjon.2021.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 02/09/2021] [Indexed: 12/04/2022]
Abstract
Objectives Atrioventricular conductions disturbances, requiring permanent pacemaker implantation (PPI), represent a potential complication after transcatheter aortic valve implantation (TAVI), However, little is known about the pacemaker dependency after PPI in this patient setting. This systematic review analyses the incidence of PPI, the short-term (1-year) pacing dependency, and predictors for such a state after TAVI. Methods We performed a systematic search in PUBMED, EMBASE, and MEDLINE to identify potentially relevant literature investigating PPI requirement and dependency after TAVI. Study data, patients, and procedural characteristics were extracted. Odds ratio (OR) with 95% confidence intervals were extracted. Results Data from 23 studies were obtained that included 18,610 patients. The crude incidence of PPI after TAVI was 17% (range, 8.8%-32%). PPI occurred at a median time of 3.2 days (range, 0-30 days). Pacing dependency at 1-year was 47.5% (range, 7%-89%). Self-expandable prosthesis (pooled OR was 2.14 [1.15-3.96]) and baseline right bundle branch block (pooled OR was 2.01 [1.06-3.83]) showed 2-fold greater risk to maintain PPI dependency at 1 year after TAVI. Conclusions Although PPI represents a rather frequent event after TAVI, conduction disorders have a temporary nature in almost 50% of the cases with recovery and stabilization after discharge. Preoperative conduction abnormality and type of TAVI are associated with higher PPI dependency at short term.
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Affiliation(s)
- Justine M. Ravaux
- Department of Cardio-Thoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Address for reprints: Justine M. Ravaux, MD, Department of Cardio-Thoracic Surgery, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC+), Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, P. Debyelaan, 25, 6202 AZ Maastricht, The Netherlands.
| | - Michele Di Mauro
- Department of Cardio-Thoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Kevin Vernooy
- Department of Cardiology, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Department of Cardiology, Radboud University Medical Center (Radboudumc), Nijmegen, The Netherlands
| | - Arnoud W. Van't Hof
- Department of Cardiology, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Leo Veenstra
- Department of Cardiology, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Suzanne Kats
- Department of Cardio-Thoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Jos G. Maessen
- Department of Cardio-Thoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Roberto Lorusso
- Department of Cardio-Thoracic Surgery, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
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