Antithrombotic co-medication was dichotomized in heparin bridging (weight or partial thromboplastin time-adjusted heparin) or conventional treatment (antiplatelets and/or low-dose heparin or nil).

• 以复合抗栓治疗分为两组，一组为肝素过度为口服抗凝药物，另一组为常规治疗组包括抗血小板治疗、小剂量肝素或者二者皆无。