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Kulbacka J, Rembiałkowska N, Radzevičiūtė-Valčiukė E, Szewczyk A, Novickij V. Cardiomyocytes Permeabilization and Electrotransfection by Unipolar and Bipolar Asymmetric Electric Field Pulses. Bioelectricity 2024; 6:91-96. [PMID: 39119571 PMCID: PMC11304875 DOI: 10.1089/bioe.2024.0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024] Open
Abstract
Short electric field pulses represent a novel potential approach for achieving uniform electroporation within tissue containing elongated cells oriented in various directions, such as electroporation-based cardiac ablation procedures. In this study, we investigated how electroporation with nanosecond pulses with respect to different pulse shapes (unipolar, bipolar, and asymmetric) influences cardiomyocyte permeabilization and gene transfer. For this purpose, rat cardiomyocytes (H9c2) were used. The efficacy of the pulsed electric field protocols was assessed by flow cytometry and electrogene transfer by fluorescent and holotomographic microscopy. The response of the cells was assessed by the metabolic activity (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide [MTT] assay), F-actin distribution in cells by confocal microscopy, and muscle atrophy F-box (MAFbx) marker. We show nano- and microsecond pulse protocols, which are not cytotoxic for cardiac muscle cells and can be efficiently used for gene electrotransfection. Asymmetric nanosecond pulsed electric fields were similarly efficient in plasmid delivery as microsecond and millisecond protocols. However, the millisecond protocol induced a higher MAFbx expression in H9c2 cells.
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Affiliation(s)
- Julita Kulbacka
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | - Nina Rembiałkowska
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland
| | - Eivina Radzevičiūtė-Valčiukė
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
- Institute of High Magnetic Fields, Vilnius Gediminas Technical University, Vilnius, Lithuania
| | - Anna Szewczyk
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland
| | - Vitalij Novickij
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
- Institute of High Magnetic Fields, Vilnius Gediminas Technical University, Vilnius, Lithuania
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Valenti N, Di Monaco A, Romanazzi I, Vitulano N, Troisi F, Quadrini F, Grimaldi M. A case report of cardiac neuromodulation in a young patient with a third-degree atrioventricular block. Front Cardiovasc Med 2024; 11:1370522. [PMID: 38633841 PMCID: PMC11021669 DOI: 10.3389/fcvm.2024.1370522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/13/2024] [Indexed: 04/19/2024] Open
Abstract
Background There are some functional bradyarrhythmias that are caused by a dysregulation of the autonomic nervous system, for which a therapeutic strategy of cardioneuroablation (CNA) is conceivable. Case summary In this study, we report the case of a 19-year-old woman with a non-congenital third-degree atrioventricular block (AVB), symptomatic for lipothymia and dyspnea caused by mild exertion. She had a structurally normal heart and no other comorbidities. The atropine test and the exercise stress test documented a sinus tachycardia at 190 bpm with a 2:1 AVB, a narrow QRS, and an atrioventricular conduction of 1:1 until reaching a sinus rhythm rate of 90 bpm. She underwent the CNA procedure, which targeted the inferior paraseptal ganglion plexus, with a gradual change in the ECG levels recorded during the radiofrequency delivery from a third-degree AVB to a first-degree AVB. After the procedure, we observed a complete regression of the third-degree AVB, with evidence of only a first-degree AVB and a complete regression of symptoms until the 6-month follow-up. Conclusions Although not yet included in current guidelines, the CNA procedure could be used to treat AV node dysfunction in young subjects, as it could represent an alternative to pacemaker implantation. However, more randomized studies are needed to assess the long-term efficacy of this promising technique.
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Chang D, Arbogast A, Chinyere IR. Pulsed Field Ablation and Neurocardiology: Inert to Efferents or Delayed Destruction? Rev Cardiovasc Med 2024; 25:106. [PMID: 38764610 PMCID: PMC11101192 DOI: 10.31083/j.rcm2503106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2024] Open
Abstract
Background The therapeutic use of irreversible electroporation in clinical cardiac laboratories, termed pulsed field ablation (PFA), is gaining pre-regulatory approval momentum among rhythm specialists for the mitigation of arrhythmogenic substrate without increased procedural risk. Though electroporation has been utilized in other branches of science and medicine for decades, apprehension regarding all the possible off-target complications of PFA have yet to be thoroughly identified and investigated. Methods This brief review will summarize the preclinical and adult clinical data published to date on PFA's effects on the autonomic system that interplays closely with the cardiovascular system, termed the neurocardiovascular system. These data are contrasted with the findings of efferent destruction secondary to thermal cardiac ablation modalities, namely radiofrequency energy and liquid nitrogen-based cryoablation. Results In vitro neurocardiology findings, in vivo neurocardiology findings, and clinical neurocardiology findings to date nearly unanimously support the preservation of a critical mass of perineural structures and extracellular matrices to allow for long-term nervous regeneration in both cardiac and non-cardiac settings. Conclusions Limited histopathologic data exist for neurocardiovascular outcomes post-PFA. Neuron damage is not only theoretically possible, but has been observed with irreversible electroporation, however regeneration is almost always concomitantly described.
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Affiliation(s)
- Derek Chang
- Banner University Medicine, Banner Health, Tucson, AZ 85719, USA
| | - Andrew Arbogast
- Banner University Medicine, Banner Health, Tucson, AZ 85719, USA
| | - Ikeotunye Royal Chinyere
- Banner University Medicine, Banner Health, Tucson, AZ 85719, USA
- Sarver Heart Center, University of Arizona, Tucson, AZ 85724, USA
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Pu S, Liu F, Chen Y, Luo C, Li P, Chen Y, Fu L, Liu H, Ye X, Wu S, Xue Y, Lin W. 'Single-shot' pulmonary vein isolation using a novel lotos pulsed field ablation catheter: a pre-clinical evaluation of feasibility, safety, and 30-day efficacy. Europace 2023; 26:euad362. [PMID: 38109928 PMCID: PMC10757452 DOI: 10.1093/europace/euad362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/25/2023] [Accepted: 12/08/2023] [Indexed: 12/20/2023] Open
Abstract
AIMS Pulsed field ablation (PFA) is emerging as a non-thermal, tissue-specific technique for pulmonary vein isolation (PVI) in atrial fibrillation therapy. This pre-clinical study aims to investigate the feasibility and safety of PVI using a novel PFA system including a nanosecond-scale PFA generator, a novel lotos PFA catheter, and a customized 12 Fr steerable sheath. METHODS AND RESULTS A total of 11 Yorkshire swine were included in this study, with 4 in the acute cohort and 7 in the chronic cohort. Under general anaesthesia, transseptal puncture and pulmonary vein (PV) angiography was initially performed. The PFA catheter was navigated to position at the right and left PV antrum after the electroanatomic reconstruction of the left atrium. Biphasic PFA applications were performed on PVs in both the spindle-shaped and the lotos-shaped poses. Pulmonary vein isolation and PFA-associated safety were assessed 30 min after ablation in both cohorts and 30 days later in the chronic cohort. Detailed necropsy and histopathology were performed. Additional intracardiac echocardiography and coronary angiogram were evaluated for safety. All target PVs (n = 20) were successfully isolated on the first attempt. No spasm of coronary artery or microbubble was seen during the procedure. Eleven of 12 PVs (91.6%) remained in isolation at the 30-day invasive study. No evidence of PV stenosis was observed in any targets. However, transient diaphragm capture occurred in 17.6%. Histopathological examinations showed no evidence of collateral injury. CONCLUSION This study provides scientific evidence demonstrating the safety and efficacy of the novel PFA catheter and system for single-shot PVI, which shows great potential.
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Affiliation(s)
- Sijia Pu
- School of Medicine, South China University of Technology, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Fangzhou Liu
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Yuhan Chen
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Cihua Luo
- Insight Medtech Co., Ltd, Shenzhen, China
| | - Peng Li
- Insight Medtech Co., Ltd, Shenzhen, China
| | - Yanlin Chen
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Lu Fu
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Huiyi Liu
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Xingdong Ye
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Shulin Wu
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Yumei Xue
- School of Medicine, South China University of Technology, Guangzhou, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
| | - Weidong Lin
- Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Rd, Guangzhou 510080, China
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O’Brien B, Reilly J, Coffey K, González-Suárez A, Buchta P, Buszman PP, Lukasik K, Tri J, van Zyl M, Asirvatham S. Epicardial Pulsed Field Ablation of Ganglionated Plexi: Computational and Pre-Clinical Evaluation of a Bipolar Sub-Xiphoid Catheter for the Treatment of Atrial Fibrillation. Bioengineering (Basel) 2023; 11:18. [PMID: 38247895 PMCID: PMC10813135 DOI: 10.3390/bioengineering11010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/13/2023] [Accepted: 12/22/2023] [Indexed: 01/23/2024] Open
Abstract
Epicardial pulsed field ablation (PFA) of ganglionated plexi (GPs) is being explored as a potential treatment for atrial fibrillation. Initial work using open-chest access with a monopolar ablation device has been completed. This study describes the early development work for a device that can be used with subxiphoid access and deliver bipolar ablation pulses. Electric field computational models have been used for the initial guidance on pulse parameters. An in vivo assessment of these ablation parameters has been performed in an open-chest canine study, while subxiphoid access and navigation of the device has been demonstrated in a porcine model. Results from this acute study have demonstrated the promising potential of this approach.
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Affiliation(s)
- Barry O’Brien
- AtriAN Medical Ltd., Unit 204, Business Innovation Centre, Upper Newcastle, H91 W60E Galway, Ireland
| | - John Reilly
- AtriAN Medical Ltd., Unit 204, Business Innovation Centre, Upper Newcastle, H91 W60E Galway, Ireland
| | - Ken Coffey
- AtriAN Medical Ltd., Unit 204, Business Innovation Centre, Upper Newcastle, H91 W60E Galway, Ireland
| | - Ana González-Suárez
- Translational Medical Device Laboratory, School of Medicine, University of Galway, H91 YR71 Galway, Ireland
- Valencian International University, Valencia, Spain
| | - Piotr Buchta
- 3rd Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
- Silesian Center for Heart Diseases, 41-800 Zabrze, Poland
- Center for Cardiovascular Research and Development, American Heart of Poland, Kostkowice, Poland
| | - Piotr P. Buszman
- Center for Cardiovascular Research and Development, American Heart of Poland, Kostkowice, Poland
- Andrzej Frycz Modrzewski Kraków University, 30-705 Kraków, Poland
| | - Karolina Lukasik
- Center for Cardiovascular Research and Development, American Heart of Poland, Kostkowice, Poland
| | - Jason Tri
- Mayo Clinic, Rochester, MN 55905, USA
| | - Martin van Zyl
- Royal Jubilee Hospital, University of British Columbia, Victoria, BC, Canada
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