Native aorto-ostial coronary lesions on CT coronary angiogram

Area of Science:

• Cardiovascular imaging
• Interventional cardiology
• Radiology

Background:

• Aorto-ostial coronary lesions (AOLs) pose significant risks and may be overlooked during invasive coronary angiography.
• The complex nature of AOLs necessitates advanced imaging techniques for accurate detection.

Purpose of the Study:

• To highlight the utility of computed tomography coronary angiogram (CTCA) in detecting AOLs.
• To present CTCA's advantage in visualizing surrounding anatomy and identifying diverse AOL etiologies.
• To introduce the "CIAO (TEDS)" mnemonic for comprehensive AOL assessment.

Main Methods:

• Review of CTCA imaging in patients with suspected or confirmed AOLs.
• Analysis of CTCA's sensitivity and specificity for AOL detection compared to invasive methods.
• Categorization of AOL etiologies using the "CIAO (TEDS)" framework.

Main Results:

• CTCA demonstrates high sensitivity and specificity for detecting AOLs.
• CTCA effectively visualizes perivascular anatomy, crucial for identifying non-atherosclerotic causes of AOLs.
• The "CIAO (TEDS)" mnemonic (Congenital anomalies, Compression, Iatrogenic, Arteritis, Other – Thrombus, Embolism, Dissection, Spasm) provides a structured approach to AOL assessment.

Conclusions:

• CTCA is a valuable tool for diagnosing AOLs, offering superior visualization of surrounding structures.
• CTCA facilitates the identification of a broad spectrum of AOL causes beyond atherosclerosis.
• The "CIAO (TEDS)" mnemonic serves as a practical aid for radiologists and cardiologists evaluating AOLs.