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Published on: February 10, 2012
Cardiac allograft vasculopathy: coronary computed tomography and virtual histology assessment
S M Ballesteros Pradas1, N Romero Rodríguez, E Lage Gallé
1Department of Cardiology, Virgen del Rocio University Hospital, Seville, Spain. sara_mbp@hotmail.com
Insights
Coronary CT can detect inflammatory plaque in cardiac transplant recipients, offering a noninvasive diagnostic approach. Further studies are needed to confirm its role in managing graft vessel disease.
Area of Science:
- Cardiology
- Transplantation Medicine
- Medical Imaging
Background:
- Cardiac allograft vasculopathy is a major cause of late mortality after heart transplantation.
- Current diagnostic methods like coronary angiography and intravascular ultrasound are invasive.
- Noninvasive techniques such as coronary CT and virtual histology require further assessment.
Purpose of the Study:
- To evaluate the correlation between virtual histology and coronary CT findings in heart transplant recipients.
- To assess the utility of noninvasive imaging in diagnosing cardiac allograft vasculopathy.
Main Methods:
- Coronary angiography, intravascular ultrasound with virtual histology, and coronary CT were performed.
- Virtual histology analyzed intimal thickening >0.5 mm, categorizing plaque based on inflammatory components.
- Plaque was classified as inflammatory (necrotic core >30% and calcium) or non-inflammatory (<30% combined).
Main Results:
- The study included 10 heart transplant patients.
- A calcium component within inflammatory plaque was identifiable by coronary CT.
- Coronary CT demonstrated potential for detecting inflammatory plaque characteristics.
Conclusions:
- Coronary CT may serve as an initial noninvasive tool for detecting inflammatory plaque in graft vessel disease.
- Further research is necessary to validate coronary CT for definitive diagnosis and management.
Introduction:
Cardiac allograft vasculopathy remains the leading cause of late morbidity and mortality in heart transplantation. The main diagnostic methods, coronary angiography or intracoronary ultrasound (when angiography is normal), are invasive. Other study methods, such as coronary computed tomography (CT) and virtual histological analysis, have not been widely assessed in this condition.
Objective:
The objective of this study was to assess the correlation between data obtained from analysis of virtual histology compared with those obtained from the performance of coronary CT in cardiac transplant recipients.
Materials And Methods:
During the same admission we performed coronary angiography and intravascular ultrasound with virtual histological analysis (automatic pull-back in anterior descending artery and one additional vessel if the former was normal) as well as coronary CT.
Results:
The study included 10 patients. Virtual histology was done in segments with intimal thickening>0.5 mm, defining 2 groups of plaque, those with an inflammatory component (necrotic core>30% and calcium) versus those without it defined as the combination of both being <30%. A calcium component of the inflammatory plaque allowed coronary CT detection.
Conclusions:
The detection of inflammatory plaque in graft vessel disease can be based on an initial noninvasive method, such as coronary CT, although confirmation requires further study.
