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A Comparative Study Between Cold Static Storage and Normothermic Ex-Situ Donor Heart Preservation in a Rat Model of Heterotopic Heart Transplantation.

J Surg Res

January 2025

Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital and Medical School, Gwangju, Republic of Korea; Extracorporeal Circulation Research Team, Chonnam National University Hospital, Gwangju, Republic of Korea. Electronic address:

Introduction: Cold static storage (CSS) and normothermic ex-situ preservation are the most widely used donor heart preservation techniques worldwide. The current study compares both CSS and normothermic ex-situ preservation methods in terms of graft performance, morphologic changes, and acute immune response in an experimental model.

Method And Materials: Twenty rats underwent heterotopic abdominal heart transplantation after 2 h of CSS (group 1; n = 10) or normothermic ex-situ perfusion (group 2; n = 10).

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Racial and ethnic disparities on the heart transplant waiting list.

Int J Cardiol

January 2025

Department of Medicine, Section of Cardiology, Temple University Hospital, Philadelphia, PA, United States of America.

Background: Racial disparities continue to affect countless individuals across the United States and is an ongoing issue in heart transplantation (HTx). Though inequities for post-transplant survival have been heavily studied, there remains conflicting data in waitlist outcome metrics. Our investigation aims to address this by analyzing death on, and transplantation from, the waitlist across multiple racial groups.

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Background: Long-term renal allograft acceptance has been achieved in macaques using a transient mixed hematopoetic chimerism protocol, but similar regimens have proven unsuccessful in heart allograft recipients unless a kidney transplant was performed simultaneously. Here, we test whether a modified protocol based on targeting CD154, CD2, and CD28 is sufficient to prolong heart allograft acceptance or promote the expansion of regulatory T cells.

Methods: Eight macaques underwent heterotopic allo-heart transplantation from major histocompatibility complex-mismatched donors.

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Transcatheter Caval Implantation for Severe Tricuspid Regurgitation.

Curr Cardiol Rep

January 2025

Department of Cardiovascular Medicine, Heart Vascular & Thoracic Institute, Cleveland Clinic, 9500 Euclid Avenue, J2-3, Cleveland, OH, 44195, USA.

Purpose Of Review: We describe the evolution of caval valve implantation (CAVI) as a treatment for severe symptomatic tricuspid regurgitation (TR) in the high surgical risk patient.

Recent Findings: Surgical treatment of severe TR is often limited by the high surgical risk of the patients who tend to develop severe secondary TR. Coaptation, annuloplasty, and orthotopic replacement strategies are all limited by annular and leaflet geometry, prior valve repair, and the presence of cardiac implantable device leads.

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Background: Improvement in gene modifications of donor pigs has led to the prevention of early cardiac xenograft rejection and significantly prolonged cardiac xenograft survival in both heterotopic and orthotopic preclinical non-human primate (NHP) models. This progress formed the basis for FDA approval for compassionate use transplants in two patients.

Methods: Based on our earlier report of 9-month survival of seven gene-edited (7-GE) hearts transplanted (life-supporting orthotopic) in baboons, we transplanted 10 gene-edited pig hearts into baboons (n = 4) using non-ischemic continuous perfusion preservation (NICP) and immunosuppression regimen based on co-stimulation blockade by anti-CD40 monoclonal antibody.

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