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Diagnostic accuracy of high-definition CT coronary angiography in high-risk patients
S S Iyengar1, G Morgan-Hughes2, O Ukoumunne3
1Department of Radiology, Plymouth Hospital NHS Trust, Derriford Hospital, Derriford Road, Plymouth, Devon PL6 8DH, UK.
Insights
High-definition CT coronary angiography (HD-CTCA) with experienced readers demonstrates high accuracy in diagnosing coronary artery disease (CAD) in high-risk patients. This advanced imaging technique shows diagnostic performance comparable to invasive coronary angiography (ICA).
Area of Science:
- Cardiovascular Imaging
- Radiology
- Diagnostic Accuracy
Background:
- Coronary artery disease (CAD) diagnosis relies on accurate imaging.
- Invasive coronary angiography (ICA) is the gold standard but carries risks.
- Non-invasive imaging modalities are crucial for risk stratification.
Purpose of the Study:
- To evaluate the diagnostic accuracy of high-definition CT coronary angiography (HD-CTCA).
- To assess the role of experienced readers in HD-CTCA interpretation.
- To compare HD-CTCA with ICA in high-risk patients for CAD detection.
Main Methods:
- Three hundred high-risk patients underwent both HD-CTCA and ICA.
- Independent experts performed blinded image evaluation for stenosis (≥50% and ≥70%).
- HD-CTCA results were compared against ICA as the reference standard.
Main Results:
- HD-CTCA demonstrated high sensitivity and specificity for both moderate (≥50%) and severe (≥70%) stenosis.
- Per-patient analysis showed excellent diagnostic values, e.g., 97.1% sensitivity and 97.9% specificity for moderate stenosis.
- High concordance between HD-CTCA and ICA was observed.
Conclusions:
- HD-CTCA, when interpreted by experienced readers, offers high diagnostic accuracy for CAD in high-risk individuals.
- This non-invasive method achieves accuracy comparable to invasive coronary angiography.
- Advanced CT technology may expand its clinical utility in cardiovascular diagnostics.
Aim:
To assess the diagnostic accuracy of computed tomography coronary angiography (CTCA) using a combination of high-definition CT (HD-CTCA) and high level of reader experience, with invasive coronary angiography (ICA) as the reference standard, in high-risk patients for the investigation of coronary artery disease (CAD).
Materials And Methods:
Three hundred high-risk patients underwent HD-CTCA and ICA. Independent experts evaluated the images for the presence of significant CAD, defined primarily as the presence of moderate (≥ 50%) stenosis and secondarily as the presence of severe (≥ 70%) stenosis in at least one coronary segment, in a blinded fashion. HD-CTCA was compared to ICA as the reference standard.
Results:
No patients were excluded. Two hundred and six patients (69%) had moderate and 178 (59%) had severe stenosis in at least one vessel at ICA. The sensitivity, specificity, positive predictive value, and negative predictive value were 97.1%, 97.9%, 99% and 93.9% for moderate stenosis, and 98.9%, 93.4%, 95.7% and 98.3%, for severe stenosis, on a per-patient basis.
Conclusion:
The combination of HD-CTCA and experienced readers applied to a high-risk population, results in high diagnostic accuracy comparable to ICA. Modern generation CT systems in experienced hands might be considered for an expanded role.
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