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Updated: Feb 4, 2026
A Porcine Heterotopic Heart Transplantation Protocol for Delivery of Therapeutics to a Cardiac Allograft
Published on: February 14, 2022
Cardiac allograft vasculopathy: A review
Michael S Lee1, Rigved V Tadwalkar1, William F Fearon2
1Division of Cardiology, UCLA Medical Center, Los Angeles, California.
Insights
Cardiac allograft vasculopathy (CAV) after heart transplant is challenging to detect. Management involves medication, intravascular imaging, and potentially repeat transplantation for severe cases.
Area of Science:
- Cardiology
- Transplantation Immunology
Background:
- Cardiac allograft vasculopathy (CAV) is a major cause of death after orthotopic heart transplantation (OHT).
- CAV development involves inflammation, endothelial dysfunction, and genetic/patient factors.
- Early detection of CAV is difficult due to variable or absent symptoms.
Purpose of the Study:
- To review the diagnosis, management, and treatment options for cardiac allograft vasculopathy.
Main Methods:
- Review of current diagnostic tools including coronary angiography, intravascular imaging (IVUS, OCT), and non-invasive imaging (PET, CT, MRI).
- Discussion of medical management strategies, including statins, vasodilators, and immunosuppression.
- Evaluation of interventional and surgical options, including percutaneous coronary intervention and re-transplantation.
Main Results:
- Coronary angiography is the primary diagnostic tool, supplemented by intravascular imaging and physiologic assessments.
- Medical therapy aims to reduce rejection and CAV progression with minimal side effects.
- Repeat transplantation is the only definitive treatment but is reserved for select patients.
Conclusions:
- Effective management of CAV requires a multi-faceted approach combining diagnostics and tailored therapies.
- Optimizing immunosuppression and medical management is crucial for long-term outcomes.
- Invasive procedures and repeat transplantation offer options for refractory cases but carry significant risks.
Abstract:
Cardiac allograft vasculopathy (CAV) is a complex disease that remains a significant cause of morbidity and mortality after orthotopic heart transplantation (OHT). Originating as a result of inflammatory response, the development and progression of CAV is attributed to endothelial dysfunction, cellular infiltration, and a wide-range of genetic and patient factors. The detection of CAV remains a diagnostic challenge, as symptoms can be variable or absent. While coronary angiography remains the initial test of choice for the diagnosis and surveillance of CAV, intravascular imaging (either by ultrasound or optical coherence tomography) and physiologic assessments are useful adjuncts in the cardiac catheterization laboratory. Positron emission tomography, computed tomographic, and magnetic resonance imaging may have a role increasing the time interval between invasive screening tests for prognosis. Medical management should include a statin, vasodilator, and tailored immunosuppressive regimen that maximally decrease allograft rejection and CAV progression while causing minimal side effects. Patients that are less responsive to pharmacotherapy should be considered for invasive management with percutaneous coronary intervention. Although surgical revascularization is a poor option, repeat OHT is the only definitive treatment option but given its morbidity should be reserved for a highly selected patient population.
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