Safety and Efficacy of Prolonged Use of Bivalirudin 4 Hours After Elective PCI in Patients With CHD (COBER Study)
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 330
- 试验地点
- 1
- 主要终点
- The incidence rate of PMI in CHD patients 3 days after ePCI
研究概览
简要总结
Since the development of percutaneous coronary intervention (PCI) in patients with coronary heart disease (CHD), unfractionated heparin (UFH) and low molecular weight heparin (LWMH) have been the preferred anticoagulants in peri-operative period. However, UFH has some defects, such as incomplete and unstable inhibition of thrombin, large individual differences, multiple monitoring of activated coagulation time (ACT), ineffective thrombin binding to fibrin, non-specific protein binding and induced thrombocytopenia (HIT). Compared with UFH, LWMH has lower non-specific protein binding rate, but it is not superior to UFH in efficacy, hemorrhage and HIT.
Bivalirudin can bind specifically to thrombin catalytic site and anionic external binding site, directly inhibit thrombin activity, thereby inhibiting thrombin-catalyzed and induced reactions. At the same time, thrombin can also inactivate it by enzymatic hydrolysis of bivalirudin. Therefore, the inhibition of bivalirudin on thrombin is reversible and transient, and the risk of bleeding after drug withdrawal is relative small. It has been reported that bivalirudin can significantly reduce the risk of peri-operative bleeding during PCI period compared with UFH. Clopidogrel had not yet played a role in most patients after emergency PCI, and there was a "blank period" for 2-4 hours without effective antithrombotic concentration, which was also the peak period of acute stent thrombosis. Han and coworkers have shown that for acute myocardial infarction (AMI) patients undergoing emergency PCI, whether or not glycoprotein IIb/IIIa inhibitors were added, prolonged peri-operative use of bivalrudin was significantly better than UFH in terms of net clinical adverse event. However, for patients with elective PCI (ePCI), prolonged bivalirudin use was only used in some patients in REPLACE-2 and ISAR-REACT-3 studies, and the prolonged time of bivalrudin use after ePCI was not definite.
Therefore, in the current study we aim to explore the efficacy and safety of prolonged bivalirudin use 4 hours after elective PCI in patients with CHD.
详细描述
The current study is designed as a single-center, randomized and prospective study aiming to evaluate the safety and efficacy of prolonged continuous use of bivalirudin 4 hours after ePCI for the treatment of peri-operative myocardial injury (PMI) compared with the bivalirudin use during ePCI. Based on previous study reported and estimated 10% loss follow-up of these patients in each arm, a total of 330 patients with CHD were required in our study, and with 165 patients per group as a ratio of 1:1 randomization.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 100 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •De novo lesions
- •elective PCI
- •Only single coronary artery treated at this time
排除标准
- •Those who meet the diagnostic criteria of acute myocardial infarction
- •Patients with cardio-genic shock
- •Patients with multiple organ failure
- •Patients allergic to contrast
- •Patients who can not tolerate dual antiplatelet therapy
- •Patients who can't tolerate anticoagulation
- •Recently infected patients
- •Patients with hepatorenal dysfunction
- •Thrombotic lesion of coronary artery
- •Chronic total coronary occlusion lesion
- •Patients with complex coronary bifurcation requiring two stent strategy
- •Severe coronary calcified lesion
- •Patients with percutaneous coronary angioplasty
- •Patients with directional coronary atherectomy or rotational atherectomy
- •Patients with drug coated balloon treatment
- •Patients with bioabsorbable vascular scaffold implantation
- •Previous percutaneous coronary intervention
- •Previous coronary artery bypass graft
- •Patients with active stage of autoimmune disease
研究组 & 干预措施
prolonged continuous use of bivalirudine
A total of 165 patients are assigned to group with prolonged continuous use of bivalirudin after randomization schedule.
干预措施: prolonged continuous use of bivalirudin (Drug)
bivalirudin use during ePCI
A total of 165 patients are assigned to group with bivalirudin use during ePCI after randomization schedule.
干预措施: bivalirudin use during ePCI (Drug)
结局指标
主要结局
The incidence rate of PMI in CHD patients 3 days after ePCI
时间窗: Clinical follow up at 3 days after ePCI
the incidence rate of PMI indicated by the changes of myocardial injury biomarkers (such as TNI and CK-MB) in CHD patients between prolonged use of bivalirudin and bivalirudin use during ePCI groups
次要结局
- The incidence rate of MACEs and bleeding(Clinical follow up at 7 days after ePCI)