Platelet activation and cardiovascular co-morbidities in patients with chronic obstructive pulmonary disease.

Objective: Platelet activation in COPD patients is associated with an increased risk of cardiovascular events. Aim of the study: to assess the mean platelet volume (MPV), as an index of platelet activation, in patients with COPD both when stable or during exacerbation. Research design and methods: 478 patients with COPD (75 with exacerbation) and 72 age-matched healthy controls were enrolled. Medical history, co-morbidities, medications, pulmonary function tests, MPV and blood cell count, erythrocyte sedimentation rate (ERS) and C reactive protein (CRP) were recorded. Results: MPV was higher in COPD patients than in controls (8.7 \ub1 1.1 fL and 8.4 \ub1 0.8 fL respectively, p = 0.025) and increased across the severity of the diseases as assessed by the GOLD post bronchodilator FEV1 categorized I to IV (p>0.05). MPV was higher in COPD patients during acute exacerbation as compared with stable condition (8.7 \ub1 1.0 fL and 8.9 \ub1 1.0 fL, p = 0.021). MPV 65 10.5 fL correlated with the presence of at least one co-existing cardiovascular disease (p = 0.008) . No correlation was observed between MPV and CRP or ERS in patients or in controls. An inverse significant correlation was found between platelets count and MPV in COPD patients. Conclusions: Elevated MPV is associated with lower platelet count and with cardiovascular co-morbidity in COPD patients. MPV value is higher in more severe COPD and during acute exacerbation. Present findings warrant future studies to confirm a possible clinically relevant role for platelet activation and cardiovascular risk in the population of COPD