Key result
Elevated fibrinogen is linked to troponin-defined periprocedural MI after elective PCI regardless of platelet reactivity.
Why the study?
It was unknown whether serum fibrinogen and residual platelet reactivity after clopidogrel pre-treatment are associated with adverse cardiovascular events through independent or interactive effects.
Is elevated serum fibrinogen or residual platelet reactivity associated with periprocedural myocardial infarction in patients undergoing elective PCI with clopidogrel pre-treatment?
Population
189 patients undergoing elective PCI with clopidogrel pre-treatment
Comparison
Elevated serum fibrinogen vs residual platelet reactivity
Design
Prospective cohort study
Authors
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Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“I am not prepared to accept that a platelet count over 400,000 would make no contribution, even if many of the PCI related infarcts are within a range of 150-300,000. I don't know how much power there is in the discussion. The role of tissue factor (plaque), and of platelets in hemostasis is undeniable.”
“How ironic that an old diagnostic parameter should reappear in the limelight of diagnostic predictors. Of course, decades ago, doctors asked for 'sed rates', seeking to know if red cells, thought to be bound to fibrinogen, settled faster in a patient compared to a control subject's blood. Fibrinogen has always been a diagnostic number in evaluating inflammatory results.”
Fibrinogen elevation may signal higher PPMI risk in elective PCI; leaves open causal role and therapeutic implications.
Cohort (n=189)
Is elevated serum fibrinogen or residual platelet reactivity associated with periprocedural myocardial infarction in patients undergoing elective PCI with clopidogrel pre-treatment?
p-value: p=0.017
Elevated plasma fibrinogen, rather than residual platelet reactivity, is independently associated with an increased risk of periprocedural myocardial infarction during elective PCI in patients pre-treated with clopidogrel.
Ang et al. (2012) conducted a cohort in Elective percutaneous coronary intervention (n=189). Elevated plasma fibrinogen vs. Lower plasma fibrinogen was evaluated on Troponin-defined periprocedural myocardial infarction (PPMI) (p=0.017). Elevated plasma fibrinogen was significantly associated with troponin-defined periprocedural myocardial infarction (363.1 vs 309.1 mg/dl; p=0.017) following elective PCI, regardless of platelet reactivity.
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