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Immuno-Electrophysiological Mechanisms of Functional Electrical Connections between Recipient and Donor Heart in Patients with Orthotopic Heart Transplantation Presenting with Atrial Arrhythmias

dc.contributor.authorHerweg B
dc.contributor.authorNellaiyappan M
dc.contributor.authorWelter-Frost A.M
dc.contributor.authorTran T
dc.contributor.authorMabry G
dc.contributor.authorWeston K
dc.contributor.authorTobón C
dc.contributor.authorSaiz J
dc.contributor.authorNoujaim S
dc.contributor.authorWeston M.W.
dc.date.accessioned2022-09-14T14:33:49Z
dc.date.available2022-09-14T14:33:49Z
dc.date.created2021
dc.identifier.issn19413149
dc.identifier.urihttp://hdl.handle.net/11407/7486
dc.descriptionBackground: The formation of recipient-to donor atrio-atrial connections (AAC) in patients after orthotopic heart transplantation (OHT) is poorly understood. We sought to investigate the mechanisms of atrial tachyarrhythmias after OHT, the role of AACs, and their relationship to the immunologic match. Methods: In a large series of OHT patients, we performed a retrospective review of 42 patients who underwent catheter ablation for atrial arrhythmias. A realistic 3-dimensional computer model of human atria was used to study AAC conductivity. Results: Patient age was 55±15 years (71% male). Biatrial anastomosis was present in 24/42 patients (57%). An AAC was found in 9/42 patients (21%, right-sided in 5 patients with biatrial anastomosis, left-sided in 4 patients). The AAC became apparent at the time of the electrophysiology study 10.1±7.6 years after OHT (range, 0.3-22.2 years). Donor-specific antibodies were present in no patient with AAC but were present in 69% of patients without AAC, P=0.002. In all patients with AAC, a recipient atrial tachycardia propagated via AAC to the donor atrium (4 patients presented with atrial fibrillation). Simulations showed AAC conduction requires an isthmus of ≥2 mm and is cycle length and location dependent. Patients without AAC (n=13) frequently presented with donor atrial arrhythmias, in 77% cavo-tricuspid isthmus flutter was ablated. The procedural success was high, although, 12 patients (29%) required reablation. Conclusions: AACs are found in 21% of OHT patients with atrial tachyarrhythmias and can manifest very early after OHT. Immune privilege characterized by the absence of donor-specific antibodies may facilitate AAC formation. Propagation across an AAC is width, cycle length, and location dependent. Patients with AAC present with focal atrial tachycardias or atrial fibrillation originating from the recipient atria; patients without most frequently present with cavo-tricuspid isthmus dependent atrial flutter. While multiple arrhythmias frequently require reablation, ablative therapy is highly effective. Graphic Abstract: A graphic abstract is available for this article. © 2021 American Heart Association, Inc.eng
dc.language.isoeng
dc.publisherLippincott Williams and Wilkins
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85104626921&doi=10.1161%2fCIRCEP.120.008751&partnerID=40&md5=42dee4cbc3bd427accda6f41fa650d2c
dc.sourceCirculation: Arrhythmia and Electrophysiology
dc.titleImmuno-Electrophysiological Mechanisms of Functional Electrical Connections between Recipient and Donor Heart in Patients with Orthotopic Heart Transplantation Presenting with Atrial Arrhythmias
dc.typeArticle
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.publisher.programCiencias Básicas
dc.type.spaArtículo
dc.identifier.doi10.1161/CIRCEP.120.008751
dc.subject.keywordAtrial fibrillationeng
dc.subject.keywordCatheter ablationeng
dc.subject.keywordElectrophysiologyeng
dc.subject.keywordHeart transplantationeng
dc.subject.keywordTachycardiaeng
dc.relation.citationstartpage412
dc.relation.citationendpage423
dc.publisher.facultyFacultad de Ciencias Básicas
dc.affiliationHerweg, B., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States, Tampa General HospitalFL, United States
dc.affiliationNellaiyappan, M., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States
dc.affiliationWelter-Frost, A.M., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States
dc.affiliationTran, T., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States, Tampa General HospitalFL, United States
dc.affiliationMabry, G., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States
dc.affiliationWeston, K., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States
dc.affiliationTobón, C., Nanostructured Materials and Bio-modeling (MATBIOM), Universidad de Medellín, Colombia
dc.affiliationSaiz, J., Centro de Investigación e Innovación en Bioingeniería (Ci2B), Universitat Politècnica de València, Spain
dc.affiliationNoujaim, S., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States, Molecular Pharmacology and Physiology, University of South Florida, Morsani College of Medicine, United States
dc.affiliationWeston, M.W., Department of Cardiovascular Sciences, University of South Florida, Morsani College of Medicine, United States, Tampa General HospitalFL, United States
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dc.type.coarhttp://purl.org/coar/resource_type/c_6501
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.type.driverinfo:eu-repo/semantics/article
dc.identifier.reponamereponame:Repositorio Institucional Universidad de Medellín
dc.identifier.repourlrepourl:https://repository.udem.edu.co/
dc.identifier.instnameinstname:Universidad de Medellín


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