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Influence of haematological parameters before coronary angioplasty on subsequent restenosis
Ahmet Avci1, Ayca Boyaci, Kerim Cağli
1Turkiye Yuksek Ihtisas Hospital, Department of Cardiology, Ankara, Turkey.
Insights
Larger mean platelet volume is a significant predictor of restenosis after percutaneous transluminal coronary angioplasty (PTCA). This finding suggests platelet size is a key factor in coronary intervention outcomes.
Area of Science:
- Cardiology
- Hematology
- Interventional Cardiology
Background:
- Restenosis is a major complication following percutaneous transluminal coronary angioplasty (PTCA), affecting nearly one-third of patients.
- Platelets are recognized to play a crucial role in the development of restenosis after coronary interventions.
Purpose of the Study:
- To identify predictors of restenosis after successful PTCA.
- To investigate the association between hematological parameters, including mean platelet volume, and the occurrence of restenosis.
Main Methods:
- A prospective study involving 102 patients with stable angina who underwent successful PTCA.
- Comparison of demographic, lipid, and hematological parameters between patients with and without restenosis.
- Analysis of coronary angiographies for restenosis assessment.
Main Results:
- Patients with restenosis exhibited significantly higher mean platelet volume (MPV), white cell count, and fibrinogen levels.
- Larger pre-procedural mean platelet volume was strongly associated with an increased risk of restenosis (odds ratio 10.43, p < 0.01).
- Diabetes and male gender showed a trend towards increased restenosis risk, but were not statistically significant predictors in this cohort.
Conclusions:
- Mean platelet volume is a significant predictor of restenosis after successful coronary angioplasty.
- Platelet size, specifically mean platelet volume, appears to be a primary factor influencing restenosis development.
- No significant association was found between restenosis and other hematological parameters like hemoglobin, hematocrit, or platelet count.
Objectives:
Restenosis is the major limitation of coronary interventions occurring in nearly a third of the patients undergoing percutaneous transluminal coronary angioplasty (PTCA) with no single, definite predictor demonstrated in an individual patient. Platelets are known to play an important role in the pathogenesis of subsequent restenosis.
Methods And Results:
In a prospective study, follow-up coronary angiographies were performed in 102 consecutive patients with stable angina who underwent a successful PTCA for single-vessel coronary artery disease. Demographics, baseline lipid profiles (total cholesterol, HDL- and LDL-cholesterol, triglycerides) and haematological parameters (red cell, white cell and platelet counts, haemoglobin concentration, haematocrite %, mean platelet volume, platelet mass and fibrinogen levels) were compared between patients with and without restenosis. In the restenosis group, mean platelet volume (8.82 +/- 0.78 fl vs. 8.13 +/- 0.64 fl, p < 0.001), white cell count (8673 +/- 322 x 10(3)/microl vs. 7513 +/- 232 x 10(3)/microl, p < 0.01) and fibrinogen level (4.2 +/- 1.4 g/l vs 3.6 +/- 1.1 g/l) were significantly higher. The relative odds for developing angiographically defined restenosis were 2.49 times greater in diabetics (p = 0.11) and 2.54 times greater in men (p = 0.13). It is 1.43 times greater in patients with higher fibrinogen levels (p = 0.16). But, the relative odds for developing restenosis were 10.43 times greater in patients with larger pre-procedural mean platelet volumes (p < 0.01).
Conclusions:
There was a positive correlation between mean platelets volume and loss in luminal diameter between post-angioplasty and follow-up angiographies (r = +2.345, p = 0.01). There was no association between restenosis and haemoglobin, haematocrit, red cell count, white cell count, platelet count, platelet mass and plasma fibrinogen level. The development of restenosis after successful coronary angioplasty may be mainly influenced by the platelet size.
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