Angioscopic evaluation of angiographically complex coronary lesions

Area of Science:

• Cardiology
• Interventional Cardiology
• Vascular Imaging

Background:

• Angiographically complex coronary lesions require precise characterization for effective intervention.
• Coronary angioscopy (CA) offers direct endoluminal visualization, but its utility in complex lesions is not fully established.

Purpose of the Study:

• To determine the value of coronary angioscopy in elucidating the underlying substrate of angiographically complex coronary lesions.
• To correlate angioscopic findings with lesion complexity and procedural outcomes.

Main Methods:

• Coronary angioscopy was performed in 47 patients with angiographically complex lesions before intervention.
• Lesions were categorized by complexity: occlusions, intraluminal filling defects, or high eccentricity.
• Angioscopic findings included red thrombus presence/type and plaque color (yellow, white, mixed).

Main Results:

• Coronary angioscopy detected red thrombus in 72% of patients and atherosclerotic plaque in 96%.
• Thrombus incidence was higher in occluded vessels (91%) and lesions with defects/ulceration (87%) compared to eccentric lesions (37%).
• Lesions with protruding thrombus showed lower initial procedural success (64%) versus those without (91%).

Conclusions:

• Most angiographically complex coronary lesions contain thrombus, with varying prevalence based on lesion type.
• Yellow or mixed plaque coloration is common, suggesting lipid-rich plaques underlie lesion complexity.
• Coronary angioscopy provides crucial substrate information that may influence interventional strategy and outcomes.