Soluble CD40 Ligand Predicts Ischemic Stroke and Myocardial Infarction in Patients With Nonvalvular Atrial Fibrillation

D. Ferro, L. Loffredo, L. Polimeni, F. Fimognari, P. Villari, P. Pignatelli, V. Fuster, F. Violi
2007 Arteriosclerosis, Thrombosis and Vascular Biology  
Objective-Atrial fibrillation (AF) is associated with a high incidence of vascular disease that may be related to a prothrombotic and inflammatory state. Soluble CD40 ligand (sCD40L), which stems essentially from platelet activation, possesses inflammatory and prothrombotic properties. The aim of the study was to assess whether sCD40L is a predictor of stroke or myocardial infarction (MI) in patients with nonvalvular AF. Methods and Results-Plasma levels of sCD40L were measured in 231 patients
more » ... ed in 231 patients (177 [77%] had permanent or persistent AF, and 54 [23%] had paroxysmal AF). Patients were followed for a mean period of 27.8Ϯ8.8 months, and cardiovascular events such as fatal and nonfatal stroke and MI were recorded. AF population was divided in 2 groups according to sCD40L level above or below the median (4.76 ng/mL). The 2 patients' groups had similar distribution of cardiovascular risk factors, age, gender, medications, or serum C-reactive protein levels. During the follow-up period, vascular events occurred in 6 (2 nonfatal MI and 4 nonfatal ischemic strokes) of 116 patients with low levels of sCD40L (5.1%) and in 29 (11 fatal and 3 nonfatal MI; 3 fatal and 12 nonfatal ischemic strokes) of 115 patients with high levels (25.2%) (log-rank test: PϽ0.001). Using the COX proportional Hazards model, patients with sCD40L above the median were 4.63 times more likely to experience a vascular event (95% C.I.: 1.92 to 11.20). Conclusions-This study shows that enhanced soluble CD40L level is a predictor of vascular events in patients with nonvalvular AF, thus suggesting that enhanced platelet activation may play a role in its clinical progression.
doi:10.1161/atvbaha.107.152777 pmid:17901373 fatcat:xrfp4iaplbckjj6knlmctwjzb4