Coagulation activation in patients undergoing directional coronary atherectomy

Area of Science:

• Cardiovascular Medicine
• Hematology
• Interventional Cardiology

Background:

• Restenosis remains a significant complication following percutaneous transluminal coronary angioplasty (PTCA) and related interventions.
• Understanding the pathophysiologic mechanisms of restenosis is crucial for developing effective preventive strategies.

Purpose of the Study:

• To prospectively investigate coagulation and fibrinolytic variables in patients undergoing directional coronary atherectomy (DCA).
• To identify potential associations between these variables and the development of late restenosis after DCA.

Main Methods:

• Prospective analysis of coagulation and fibrinolytic markers in 35 patients post-DCA and 20 control patients.
• Blood samples collected pre-procedure and at 1, 24, and 48 hours post-procedure.
• Assessment of prothrombin fragments (F1+2), thrombin-antithrombin III complexes (TAT), plasminogen activator inhibitor (PAI-1), and D-Dimer/TAT ratio.

Main Results:

• Late restenosis occurred in 8 out of 35 patients (3-6 months post-DCA).
• Patients with restenosis showed significant increases in F1+2 and TAT levels compared to those without restenosis and controls.
• Elevated PAI-1 levels at 24 hours and a lower D-Dimer/TAT ratio were observed in restenosis patients, indicating hypofibrinolysis.

Conclusions:

• Coagulation activation and hypofibrinolysis in the 48 hours following DCA may be linked to the development of late restenosis.
• These findings highlight the potential role of thrombotic and fibrinolytic dysregulation in post-procedural coronary artery narrowing.