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Thromboaspiration during acute myocardial infarction in a heart transplant patient
Paola Colombo1, Giuseppe Bruschi, Manuela Agozzino
1A. De Gasperis Cardiology and Cardiac Surgery Department, Niguarda Ca'Granda Hospital, Milan, Italy. paolacolombo@fastwebnet.it
Insights
Coronary allograft vasculopathy can cause acute myocardial infarction in heart transplant patients. Mechanical thrombus extraction during percutaneous coronary intervention offers a viable treatment option for this rare complication.
Area of Science:
- Cardiology
- Transplantation Immunology
- Vascular Biology
Background:
- Coronary allograft vasculopathy (CAV) affects 10% of heart transplant recipients annually, presenting as aggressive coronary artery disease.
- The roles of thrombosis and vasospasm in CAV pathogenesis and clinical outcomes remain incompletely understood.
- Mechanical reperfusion strategies are preferred over systemic thrombolysis for acute myocardial infarction, with pre-PCI thrombus removal improving epicardial flow.
Observation:
- A 38-year-old male heart transplant recipient presented with acute inferior myocardial infarction and cardiogenic shock.
- Coronary angiography revealed acute thrombosis in the circumflex coronary artery, indicative of CAV.
- The patient had a history of ischemic cardiomyopathy necessitating the initial heart transplant.
Findings:
- Percutaneous coronary intervention (PCI) with successful thrombus extraction was performed.
- This intervention addressed the acute coronary thrombosis complicating the cardiac allograft.
Implications:
- This case highlights an unusual clinical presentation of CAV involving acute thrombosis.
- Mechanical thrombus extraction may be a crucial intervention for managing acute coronary events in CAV patients.
- Further research is warranted to elucidate the specific mechanisms of thrombosis in CAV and optimize treatment strategies.
Abstract:
Each year, an estimated 10% of heart transplant recipients develop coronary allograft vasculopathy, an aggressive form of coronary artery disease that limits survival after transplantation. The pathologic characteristics of coronary allograft vasculopathy are not uniform and both the clinical importance and pathophysiological significance of thrombosis and vasospasm in this setting are not completely understood. Mechanical reperfusion is a better alternative to systemic thrombolysis in patients with acute myocardial infarction and thrombus removal before standard percutaneous coronary intervention improves coronary epicardial flow. We report the case of a 38-year-old male admitted to the emergency room of our hospital with acute inferior myocardial infarction complicated by cardiogenic shock. He underwent heart transplant because of ischemic cardiomyopathy. Coronary angiography showed acute coronary thrombosis of the circumflex coronary artery. Percutaneous coronary intervention with thrombus extraction was successfully attempted. This case represents an unusual clinical presentation and treatment of cardiac allograft vasculopathy.
