Coronary thrombi increase PTCA risk. Angioscopy as a clinical tool

Area of Science:

• Cardiology
• Interventional Cardiology
• Medical Imaging

Background:

• Intracoronary thrombus presence is variably linked to post-coronary angioplasty complications.
• Angiography is less sensitive than angioscopy for detecting intracoronary thrombi.
• The clinical significance of thrombi detected by angioscopy but missed by angiography remains unclear.

Purpose of the Study:

• To compare the detection rates of intracoronary thrombi using angioscopy versus angiography.
• To investigate the association between angioscopically detected thrombi and adverse outcomes following percutaneous coronary angioplasty (PTCA).

Main Methods:

• 122 patients undergoing PTCA were studied using percutaneous coronary angioscopy.
• Angioscopic findings were compared with angiographic results for thrombus detection.
• In-hospital complications and recurrent ischemic events were recorded and analyzed in relation to thrombus presence.

Main Results:

• Coronary thrombi were identified in 61% of lesions by angioscopy versus only 20% by angiography.
• Patients with angioscopic thrombi experienced significantly higher rates of major in-hospital complications (14% vs 2%) and recurrent ischemia (26% vs 10%).
• Angioscopic thrombus presence strongly predicted adverse outcomes (RR 3.11), while angiographic thrombi did not (RR 0.85).

Conclusions:

• Angiography significantly underestimates the prevalence of intracoronary thrombus.
• Thrombi visualized by angioscopy, often missed by angiography, are associated with increased adverse outcomes after coronary angioplasty.