RESUMO
Objective:To investigate the dynamic changes of coagulation system following radiofrequency catheter ablation(RFCA) and effect of molecular weight heparin. Methods:Blood samples were collected at 6 different times to measure the thrombin-antithrombinⅢcomplex (TAT) and hepatocyte growth factor (HGF) in 60 RFCA candidates and 22 controls undergoing electrophysiological study (EPS).Patients were randomly divided into 2 groups.Low molecular weight heparin was given to 31 pationts (subgroup B) after RFCA,but not to the others (subgroup A). Results:①Plasma TAT exhibited a double peaked pattern in the subgroup A.The first peak occurred instantly after RFCA (42.8?15.7 ng/ml),and the second 3 days later (20.1?19.4 ng/ml).The second peak was significantly higher than that of the control group (2.7?1.5 ng/ml) and the subgroup B(4.3?5.2 ng/ml)(P