Multi-slice computed tomography coronary angiography: anatomic vs functional assessment in clinical practice

Area of Science:

• Cardiology
• Medical Imaging
• Diagnostic Accuracy

Background:

• Non-invasive imaging is crucial for diagnosing and stratifying coronary artery disease (CAD) risk.
• Techniques like stress echocardiography and myocardial perfusion imaging assess cardiac function.
• Multi-slice computed tomography coronary angiography (CTA) now enables non-invasive imaging of coronary anatomy.

Purpose of the Study:

• To evaluate the role of non-invasive imaging, particularly CTA, in CAD diagnosis and risk stratification.
• To compare the diagnostic accuracy of CTA with conventional coronary angiography.
• To explore the complementary information provided by anatomic (CTA) and functional imaging techniques.

Main Methods:

• Review of studies on diagnostic accuracy of CTA compared to conventional coronary angiography.
• Analysis of comparative studies assessing CTA alongside functional assessment techniques.
• Evaluation of the discrepancy between anatomic stenosis on CTA and functional relevance.

Main Results:

• CTA demonstrates high diagnostic accuracy for CAD, with sensitivity and specificity around 86% and 96%.
• CTA has a high negative predictive value (97%), useful for excluding CAD in intermediate-risk patients.
• Significant stenoses on CTA are not always functionally relevant; combined imaging enhances CAD assessment.

Conclusions:

• Combining non-invasive anatomic (CTA) and functional imaging can improve CAD assessment.
• Future research should evaluate combined imaging in large populations for efficacy, safety, and cost-effectiveness.
• Development of clinical guidelines for CTA use is essential.