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Tissue factor expression in coronary circulation as a prognostic factor for late restenosis after coronary
Insights
Tissue factor (TF) levels increase in coronary circulation after percutaneous transluminal coronary angioplasty (PTCA). Elevated TF 24 hours post-PTCA predicts late restenosis, indicating its prognostic value.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Interventional Cardiology
Background:
- Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure for ischemic heart disease.
- Restenosis remains a significant complication following PTCA.
- Understanding the mechanisms of restenosis is crucial for improving patient outcomes.
Purpose of the Study:
- To investigate changes in blood coagulation markers in the coronary circulation after PTCA.
- To determine the clinical significance of these changes, particularly in relation to late restenosis.
- To evaluate tissue factor (TF) as a potential prognostic marker for restenosis.
Main Methods:
- Study included 43 patients with ischemic heart disease undergoing elective PTCA.
- Blood samples collected from the coronary sinus pre-PTCA and at 4, 24 hours post-procedure.
- Plasma levels of TF, thrombin-antithrombin III complex (TAT), and prothrombin fragment 1+2 (F 1+2) measured via ELISA.
- Coronary angiography performed at 6 months to assess minimal luminal diameter and late loss index.
Main Results:
- Significant increases in TF, TAT, and F 1+2 levels observed 24 hours after PTCA.
- A positive correlation found between TF changes at 24 hours and the late loss index at 6 months.
- Higher TF levels in coronary sinus blood were associated with late restenosis.
Conclusions:
- Tissue factor expression in the coronary circulation increases post-PTCA.
- Post-PTCA TF levels serve as a prognostic indicator for late restenosis.
- Targeting TF may offer a strategy to mitigate restenosis after coronary interventions.
Abstract:
We investigated changes in blood coagulation in the coronary circulation after percutaneous transluminal coronary angioplasty (PTCA) and its clinical significance. We examined 43 patients with ischemic heart disease who underwent elective PTCA of isolated stenotic lesions in the left coronary artery. Ten patients underwent PTCA alone, 15 received percutaneous transluminal rotational atherectomy (PTRA) and 18 stent implantation. Blood samples were drawn from the coronary sinus before and immediately after PTCA, as well as 4 and 24 h later. Plasma levels of tissue factor (TF), thrombin-antithrombin III complex (TAT) and prothrombin fragment 1+2 (F 1+2) were measured by enzyme-linked immunosorbent assay. Follow-up coronary angiography was performed 6 months after PTCA. Minimal luminal diameter was assessed by quantitative coronary angiography to evaluate late loss index. TF, TAT and F 1+2 levels in the coronary sinus blood showed significant increases 24 h after PTCA. A significant positive correlation was found between changes in TF levels 24 h after PTCA and late loss index 6 months after the procedure. TF levels in the coronary sinus blood were significantly higher in patients with late restenosis than in those without restenosis. These results suggest that TF expression in the coronary circulation after PTCA is a prognostic factor for late restenosis.
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