[Preventive Effect of Fangshuan Capsule on PCI-induced Myocardial Damage and Vascular Endo- thelial Injury in Patients with Unstable Angina Pectoris].

Objective To observe the prevention of Fangshuan Capsule (FC) on percutaneous coronary intervention (PCI) induced myocardial damage and vascular endothelial injury in patients with un- stable angina pectoris (UAP). Methods Totally 100 UAP patients undergoing PCI were assigned to the control group and the treatment group by random digit table, 50 in each group. All patients received routine Western medicine therapy. Those in the treatment group additionally took FC, 6 pills each time, three times per day for at least 2 days before PCI operation. The therapeutic course for each group was 2 weeks. The clinical therapeutic effect was observed in the two groups. Heart rate (HR), systolic blood pressure (SBP) , changes of myocardial oxygen consumption ( HR x SBP, kPa/min) were compared. The levels of serum troponin I (cTn 1), creatinine kinase-MB (CK-MB) , myoglobin (MYO) , endothelin (ET), and nitric oxide (NO) were measured before PCI, and 6, 12, 24 h, 3 and 7 days after PCI. Results The markedly effective rate of Chinese medical syndromes was 54% (17/50) and the total effective rate was 94% (47/50) in the treatment group, obviously higher than those of the control group [26% (13/50) and 88% (44/50) ; P <0. 01]. Compared with before treatment in the same group, HR, SBP, myocardial oxygen consumption, and plasma ET level were reduced, plasma NO level was elevated in two groups after treatment (P <0.05, P <0. 01). cTnl concentration increased at 6, 12, 24 h, and day 3 (P <0. 05, P <0. 01 ) ; CK-MB concentration was elevated at 6, 12, and 24 h (P <0. 05, P <0. 01) ; MYO concentration increased at 6 and 12 h (P < 0. 01) in the control group after treatment. cTnl concentration increased at 12 and 24 h (P <0. 05, P <0. 01); CK-MB concentration was elevated at 6 and 12 h (P <0. 05) ; MYO concentration increased at 6 h (P <0. 01) in the treatment group after treatment. Compared with the control group at the same time point, HR, myocardial oxygen consumption, and plasma ET level decreased (P <0. 05); cTnl decreased at 6, 12, and 24 h (P <0. 05); CK-MB concentration decreased at 12 h (P <0. 05); MYO concentration decreased at 6 and 12 h (P <0. 05) in the treatment group after treatment. Conclusion FC could effectively improve scores of Chinese medical syndromes after PCI surgery, reduce myocardial oxygen consumption, attenuate myocar- dial damage and vascular endothelial injury in UAP patients after PCI.