Comprehensive Non-invasive Versus Invasive Approach to Evaluate Cardiac Allograft Vasculopathy in Heart Transplantation: The CCTA-HTx Study
Authors' conclusion
A noninvasive strategy based on CCTA is accurate for managing patients with HTx. CCTA might be considered the preferred imaging modality for annual CAV surveillance after the first year post-HTx.
Study context
- Population
- Patients with heart transplant (HTx) who underwent coronary computed tomography angiography (CCTA), invasive coronary angiography, intravascular ultrasound, and fractional flow reservepatients with HTx
- Participants
- 37 patients
- Exposure
- Comprehensive CCTA-based approach compared with the invasive reference, which includes invasive coronary angiography, intravascular ultrasound, and fractional flow reserve, for detecting cardiac allograft vasculopathy (CAV)
- Outcome
- CAV diagnosis
- Follow-up
- Median interval between CCTA and HTx 5 years
Main finding
As reported in the abstract
Diagnosed with CAV
23
62.2%
Observational data: associations, not effects.
Further findings
Diagnostic performance of integration of diameter stenosis and plaque morphology (plaque burden at minimum lumen area >42% and percent atheroma volume >23%) at CCTA
- Accuracy
- 84%
- Sensitivity
- 83%
- Specificity
- 86%
- Highest diagnostic performance
Integration of ∆fractional flow reserve derived from coronary computed tomography trans-vessel gradient
- Increased sensitivity, albeit with decreased specificity and overall accuracy
Safety
- Lower contrast and radiation dose with the noninvasive approach, compared with the invasive approach
Original publication
Comprehensive Non-invasive Versus Invasive Approach to Evaluate Cardiac Allograft Vasculopathy in Heart Transplantation: The CCTA-HTx Study. Circ Cardiovasc Imaging. Published 7 January 2025. doi:10.
Summarised from the published abstract; every number is checked against it