Heart Transplant Logistics: From Procurement to Implantation

Organizing principle. Successful heart transplantation is a race against warm ischemia: every action from donor acceptance to aortic declamping is choreographed to minimize total ischemic time while preserving graft quality and patient safety. Registry and single-center analyses consistently show that longer cold ischemic time—especially beyond ~4 hours—worsens early outcomes, and the effect is amplified with older donors [1]. Accordingly, the workflow below is designed to keep time, temperature, and communication tightly governed.

1) Donor Operation and Organs-in-Sequence

After multidisciplinary acceptance, the procurement team performs sternotomy and in-situ cardiac assessment (ventricular function, valves, coronaries, infiltrative disease). Once the heart is declared suitable (“heart acceptable”), abdominal teams mobilize other organs in parallel to avoid delaying the heart. When the recipient team signals readiness (“cross-clamp acceptable”), systemic heparin is given and the aorta is cross-clamped. A cold preservation solution (e.g., Celsior, UW, HTK) is infused via the aortic root; the heart is explanted, trimmed, and packaged in sterile triple bags on slush (≈4 °C). Cold ischemia begins at clamp and ends with recipient declamping.

Extended preservation options. For long transports or marginal physiology, ex-vivo normothermic perfusion (Organ Care System, OCS) allows beating-heart transport with on-the-fly functional assessment and has demonstrated non-inferiority to static cold storage for standard-criteria donors in a randomized trial [2].

Donation after circulatory death (DCD). DCD heart transplantation is increasingly performed via either direct procurement and perfusion (DPP/OCS) or normothermic regional perfusion (NRP) with subsequent transport. Contemporary multicenter data show comparable short-term survival between NRP and DPP while highlighting the importance of strictly limiting asystolic warm ischemic time to mitigate primary graft dysfunction (PGD) [3,4].

2) Transport, Handover, and Time Discipline

Transport legs (OR-to-vehicle, flight time, hospital transfer, handover) are timestamped, with a designated timekeeper announcing the remaining safe ischemic window at milestones. On arrival, the graft goes directly to the back table for immediate preparation. Uniform-cooling platforms for static cold storage can improve temperature control and have been associated with lower severe PGD and resource use versus conventional ice-in-a-cooler in real-world series [5].

3) Recipient Operation and Readiness

In the recipient OR, induction, monitoring, and sternotomy proceed before donor cross-clamp to compress the timeline. After the “heart acceptable” call, cannulation and CPB begin; bicaval or biatrial cardiectomy is completed so the field is ready just before graft arrival. Hemostasis of atrial cuffs/great vessels and reperfusion readiness (vasoactives, products, pulmonary vasodilators, mechanical support contingency) are established.

4) Implantation Sequence and Reperfusion

Most centers favor a bicaval technique, which preserves atrial geometry and reduces tricuspid regurgitation and rhythm complications compared with biatrial implantation [6]. A common sequence is:

1. Left atrium, 2) IVC, 3) SVC, 4) Pulmonary artery, 5) Aorta (with meticulous de-airing).

Declamping ends cold ischemia and starts reperfusion. Temporary pacing, inotropes (e.g., epinephrine, dobutamine), and pulmonary vasodilators (e.g., inhaled NO) are titrated. Right-sided support (optimize preload, reduce PVR, consider milrinone) is often decisive in the first minutes.

5) Early Post-implant Management

Immediate concerns include primary graft dysfunction (PGD), right-heart failure, vasoplegia, arrhythmias, and bleeding. The ISHLT consensus defines PGD phenotypes and grades and underpins bedside management algorithms [7]. Transesophageal echo confirms ventricular performance and anastomotic integrity; lactate, SvO₂, and organ perfusion guide separation from CPB. Hemostasis (protamine, point-of-care coagulation) and judicious transfusion complete the early phase.

6) Practical Checklists and Pearls

• Two explicit calls streamline timing: (i) “Heart acceptable” → recipient proceeds to CPB; (ii) “Cross-clamp acceptable” → donor clamps and explants.
• Back-table essentials. Trim atrial cuffs for tension-free geometry; confirm coronary ostia; size-match PA/aorta; maintain continuous cold protection until implant.
• Time governance. Record clamp-on/off and transport legs; target cold ischemia as short as possible, mindful that risk rises with each additional hour [1].
• Plan B. For prolonged travel, borderline donors, or DCD grafts, consider ex-vivo perfusion and ensure readiness for temporary mechanical support (ECMO/RVAD).
• Right heart first. Anticipate RV afterload issues; prioritize oxygenation/ventilation, inhaled NO, and careful volume.

Summary

Heart transplantation is two synchronized operations linked by a disciplined logistics chain. Cold ischemic time is a key, modifiable risk: keep it short, keep the graft cold (or perfused), and align donor and recipient workflows to declamp on time. Where distance or donor type challenges static cold storage, machine perfusion (and, in DCD, NRP/DPP frameworks) expands reach without sacrificing outcomes [2–4]. In the recipient, bicaval implant and ISHLT-guided PGD management round out a modern, evidence-based playbook [6,7].

References

[1] Russo MJ, Iribarne A, Hong KN, et al. The effect of ischemic time on survival after heart transplantation varies by donor age: an analysis of the United Network for Organ Sharing database. J Thorac Cardiovasc Surg. 2007;133(3):554-559.

[2] Ardehali A, Esmailian F, Deng M, et al. Ex-vivo perfusion of donor hearts for human heart transplantation (PROCEED II): a prospective, randomized, multicentre, open-label trial. Lancet. 2015;385(9987):2577-2584.

[3] Siddiqi H, Massey HT, Naka Y, et al. Donation after circulatory death heart transplantation using normothermic regional perfusion versus direct procurement and perfusion: a multicenter U.S. analysis. J Am Coll Cardiol. 2023;81(14):1342-1354.

[4] Marasco SF, Vale M, McDonald M, et al. Impact of warm ischaemia time on survival after heart transplantation. J Heart Lung Transplant. 2012;31(4):450-456.

[5] Schmiady MO, Weixler V, Siepe M, et al. Clinical comparison of a novel, rigid, temperature-controlled transport system with conventional ice storage for donor hearts. J Thorac Dis. 2021;13(10):5908-5917.

[6] De Santo LS, Marra C, Amarelli C, et al. Bicaval versus biatrial anastomoses in orthotopic heart transplantation: a meta-analysis. J Thorac Cardiovasc Surg. 2012;144(5):980-986.

[7] Kobashigawa J, Zuckermann A, Macdonald P, et al. Report from a consensus conference on primary graft dysfunction after cardiac transplantation. J Heart Lung Transplant. 2014;33(4):327-340.