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05 respectively). 4. Compared with HF group, VFT were remarkably increased in HF-Wenxin Granule group http://www.selleck.cn/products/Everolimus(RAD001).html (P http://www.selleckchem.com/products/ch5424802.html study examined the hypothesis that AF impair SAN function by altering hyperpolarization-activated (HCN) channel expression and AF may lead to HCN channel of atria remodeling. Methods: We assessed expression of HCN1, 2, 4 and beta-subunit minK in sinus rhythm (SR) beagle canines and canines subjected to 8-week atrial tachypacing-induced http://www.selleckchem.com/products/azd9291.html atrial fibrillation (AF). Realtime RT-PCR and Western blot were used to quantify HCN subunit and beta-subunit minK mRNA and protein expression in the right atrium (RA) and sinoatrial node. Results: AF canines have longer sinus node recovery time than SR canines, which reflects impaired SAN function.HCN2 and HCN4 expression was greater at both protein and mRNA levels in sinoatrial node than RA. AF significantly decreased sinus node HCN2,4 and beta-subunit minK expression at both mRNA and protein levels,while increased HCN2,4 and beta-subunit minK expression of RA. Conclusions: The decreased expression of HCN2,4 and beta-subunit mink of sinoatrial node contribute to AF-induced sinus node dysfunction; while upregulation of atrial HCN2,4 and beta-subunit minK may help to promote maintaining of AF. Keywords: Atrial fibrillation; sinoatrial node; HCN channel; remodeling. BRADYARRHYTMIAS P071 PREDICTIVE VALUE OF ELECTROCARDIOGRAPHY AND ELECTOPHYSIOLOGICAL STUDIES IN CONDUCTION ABNORMALITIES AFTER CORE VALVE-MEDTRONIC AORTIC VALVE IMPLANTATION- PRELIMINARY RESULTS Kostopoulou A; Karyofillis P; Livanis E; Voudris V 2nd Cardiology Department, Onassis Cardiac Surgery Center, Athens, Greece Aim: Surgical aortic valve replacement is associated with complete heart block (CHB) requiring permanent pacing in 3 to 6%.