Myocardial ischemia testing with computed tomography: emerging strategies

Area of Science:

• Cardiovascular imaging
• Radiology
• Medical diagnostics

Background:

• Cardiac computed tomography (CT) effectively excludes obstructive coronary artery disease (CAD) in low-to-intermediate risk patients.
• However, CT has limited specificity in identifying ischemia-inducing lesions, hindering its role in guiding revascularization.
• Current CT limitations necessitate advanced techniques for functional assessment.

Purpose of the Study:

• To review emerging CT technologies for evaluating myocardial ischemia.
• To discuss the potential of CT perfusion (CTP), CT-derived fractional flow reserve (CT-FFR), and coronary transluminal attenuation gradient (TAG) in assessing lesion significance.

Main Methods:

• Review of recent technological advancements in cardiac CT.
• Discussion of CTP, CT-FFR, and TAG methodologies.
• Analysis of the diagnostic capabilities of these emerging techniques for myocardial ischemia.

Main Results:

• CTP, CT-FFR, and TAG offer promising approaches to provide hemodynamic information.
• These techniques aim to improve the detection of hemodynamically significant stenosis.
• Emerging CT methods have the potential to enhance the diagnostic accuracy for lesion-specific ischemia.

Conclusions:

• Advanced CT techniques like CTP, CT-FFR, and TAG are emerging tools for myocardial ischemia evaluation.
• These methods may overcome the specificity limitations of standard cardiac CT.
• Further validation is needed to establish their role in clinical decision-making for CAD management.