Transplant; Failure, Heart

The purpose of this study is to evaluate if Non-Ischemic Heart Preservation (NIHP) of extended criteria donor hearts using the XVIVO Heart Preservation System (XHPS) is a safe and effective way to preserve and transport hearts for transplantation.

Heart transplantation is the long-term treatment for children and adults with advanced heart failure. Post-transplant outcomes have improved over time, such that 50% of pediatric heart transplant recipients (HTR) remain alive with a need for re-transplantation 17-years following the initial transplant. With improved short- and medium-term outcomes, focus has shifted towards optimizing long-term survival and reducing transplant-associated morbidities. This includes strategies aimed at optimizing cardiorespiratory fitness and physical activity levels. Pediatric and adult HTRs have reduced exercise capacity compared with the general population. Previous groups have shown gradual improvements in heart rate response to exercise and exercise capacity in pediatric HTRs. However, after an initial improvement, exercise capacity appears to plateau, or even decline in pediatric HTRs, and remains sub-optimal compared with the general population. Most exercise interventions in HTRs to date have focused on moderate-intensity continuous exercise (MICE), with some resistance components incorporated. More recently, high-intensity interval training (HIIT), consisting of short, intense bursts of exercise with rest periods, has been explored in the adult HTR population, with findings to date suggesting that it may yield greater improvements in cardiorespiratory fitness compared with MICE. Exercise interventions, particularly HIIT interventions, have consistently shown clinically important improvements in exercise capacity in adult HTRs that are linked with improved long-term post-transplant outcomes and well-being. Unfortunately, trials of exercise interventions in pediatric HTRs remain lacking. This study team is proposing an assessment of the feasibility of a home-based HIIT exercise program using a novel telemedicine-enable video game linked customizable cycle ergometer (MedBIKE™).

1. Cell-free DNA does not vary significantly as a function of the activity of immunologically quiescent cardiac transplant recipients, despite the metabolic demands of the transplanted organ. (The implication of the null result would be that no restrictions to patient activity, nor modification of cardiac rehabilitation prescription, would be necessary to maintain proper test characteristics of AlloSure testing). 2. In immunologically active cardiac transplant allografts, exercise prior to assay of donor-derived cell-free DNA can be used to increase the sensitivity of the AlloSure test. (The implication of this would be that the optimal time-frame for drawing an Allosure may actually be post-exercise, and that window will be characterized).

In this study we seek to test the hypothesis that safety and clinical outcomes after cardiac transplantation utilizing HCV NAT+ donor organs as currently performed are acceptable.

Many transplant recipients may experience physical and emotional symptoms, such as anxiety, fatigue, sleep problems, pain, etc. Often, these symptoms are not reported or managed well, and can affect a patient's quality-of-life. Transplant recipients are grateful for the "gift of life" but physical and emotional symptoms reduce their quality-of-life. Transplant recipients and caregivers have felt unprepared for the ongoing symptoms and reduced quality-of-life post-transplant. One way of monitoring and managing these symptoms is using the Emotion And Symptom-focused Engagement (EASE) intervention. EASE was originally developed for patients with acute leukemia and has begun to be adapted to help monitor and manage physical and emotional symptoms for organ transplant recipients. EASE is comprised of two components: 1. Psychological - 8 supportive counselling sessions delivered by mental health clinicians to address concerns about mental health, losses from organ failure, coping with a transplant, experiences with living on the brink of death for a prolonged period of time, etc. 2. Physical - Regular assessments of physical symptoms using questionnaires and referral to healthcare professionals for symptom management as necessary. EASE uses questionnaires, also called patient reported outcome measures (PROMs), for symptom assessment and monitoring. PROMs measure symptom severity, similarly to how bloodwork measures organ functioning. PROMs, as part of EASE, will ask recipients questions and help identify relevant physical, emotional, and social symptoms to enhance their care. With the help of specialists, patients, and support from the Kidney Foundation of Canada, our team has begun to adapt the EASE intervention for transplant recipients. In order to finalize the adaptation of the EASE intervention for use in a routine transplant clinic, we are launching a pre-pilot study to gain real-life experience from managing symptoms of SOT recipients with the use of EASE-SOT.