Department of Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.
Department of Transplantation, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.
Pharmacotherapy. 2019 Apr;39(4):521-525. doi: 10.1002/phar.2219. Epub 2019 Mar 4.
Current guidelines emphasize the need for at least 6-12 months of oral dual antiplatelet therapy consisting of aspirin and a P2Y12 inhibitor following drug-eluting coronary artery stent implantation. In patients with recently implanted coronary artery stents who require urgent cardiac or noncardiac surgery, the benefits of maintaining oral dual antiplatelet therapy must be carefully weighed against the risks of excessive bleeding, and current practice is largely guided by individual surgeon preferences. When the effects of a second oral antiplatelet agent are undesirable during the perioperative period, the use of a short-acting intravenous antiplatelet agent as "bridge" therapy that can be discontinued shortly before surgery is associated with a reduced occurrence of adverse clinical events in patients with recently implanted coronary stents requiring urgent coronary artery bypass graft surgery. Cangrelor is an intravenous adenosine triphosphate analog P2Y12 receptor antagonist with a short plasma half-life that has been used off label in patients with recent coronary stents as a bridge to invasive procedures with excessive bleeding risk. To our knowledge, this is the first case report to demonstrate the safe and effective use of cangrelor as a bridge to left ventricular assist device implantation in a patient with a recently implanted drug-eluting coronary artery stent who developed acute thrombocytopenia following reexposure to tirofiban, a glycoprotein IIb/IIIa inhibitor.
目前的指南强调,在药物洗脱冠状动脉支架植入后,至少需要 6-12 个月的口服双联抗血小板治疗,包括阿司匹林和 P2Y12 抑制剂。对于近期植入冠状动脉支架且需要紧急心脏或非心脏手术的患者,必须仔细权衡维持口服双联抗血小板治疗的益处与过度出血的风险,目前的实践主要取决于个别外科医生的偏好。当第二种口服抗血小板药物在围手术期的效果不理想时,使用一种短期的静脉内抗血小板药物作为“桥接”治疗,可以在手术前不久停药,与近期植入冠状动脉支架且需要紧急冠状动脉旁路移植术的患者的不良临床事件的发生减少相关。坎格雷洛是一种静脉内三磷酸腺苷类似物 P2Y12 受体拮抗剂,其血浆半衰期短,已被超出血风险的侵入性手术的桥接,在最近植入冠状动脉支架的患者中作为标签外使用。据我们所知,这是首例报告,证明了坎格雷洛在最近植入药物洗脱冠状动脉支架的患者中作为桥接,在重新暴露于血小板糖蛋白 IIb/IIIa 抑制剂替罗非班后发生急性血小板减少症的情况下,用于左心室辅助装置植入的安全有效使用。