# Orthotopic Heart Transplantation with Concurrent Coronary Artery Bypass Grafting Using In Situ Internal Thoracic Artery

## TL;DR

This paper presents a successful heart transplant case using a donor heart with coronary artery disease, combined with bypass surgery to improve outcomes.

## Contribution

The study demonstrates a novel surgical approach to use donor hearts with focal coronary disease through concurrent bypass grafting.

## Key findings

- The patient showed improved left ventricular function post-surgery.
- The donor heart with focal coronary disease was successfully transplanted with an arterial bypass.
- The patient had preserved biventricular function at 7-month follow-up.

## Abstract

Heart transplantation remains the definitive therapy for end-stage heart failure, but donor coronary artery disease (CAD) is a common reason for allograft refusal, limiting organ availability. We describe a case of orthotopic heart transplantation using a donor heart with isolated coronary artery disease managed with concurrent surgical revascularization. A 66-year-old male with end-stage non-ischemic cardiomyopathy requiring temporary mechanical circulatory support underwent heart transplantation using a donor allograft with a focal lesion in a large first diagonal artery. Following standard implantation, a left internal mammary artery–to–first diagonal artery bypass was performed prior to reperfusion. The patient was successfully weaned from cardiopulmonary bypass with improving left ventricular function and had an uncomplicated postoperative course aside from transient delirium and dysphagia. Echocardiography demonstrated recovery of normal left ventricular function, and the patient remained clinically well with preserved biventricular function at 7-month follow-up. This case demonstrates the feasibility of orthotopic heart transplantation with concurrent coronary artery bypass grafting using an arterial conduit and supports surgical optimization of select donor hearts, with focal coronary disease as a potential strategy to expand the donor pool without compromising short-term outcomes.