143 Tissue factor pathway inhibitor regulates angiogenesis independently of tissue factor via inhibition of vascular endothelial growth factor signalling

Abstract

superoxide release in atrial samples of patients with post-operative AF but had no effect in patients with permanent AF. Similarly, atorvastatin did not induce a mevalonate-reversible changes in the atrial BH4 concentration and NOS uncoupling in neither group. Conclusions Together, these findings indicate that upregulation of NOX2-NADPH oxidases is an early but transient event in the natural history of AF, as mitochondrial oxidases and uncoupled NOS account for the statin-resistant increase in atrial superoxide production in permanent AF. Variation in atrial sources of reactive oxygen species with the duration and substrate of AF may explain the reported variability in the effectiveness of statins in the prevention and management of AF.