Objective: To observe the clinical efficacy of Huxinkang tablets in the treatment of unstable angina and its influence on the flow of coronary artery. Methods: Seventy-three unstable angina patients with phlegm stasis blocking collaterals were randomly divided into treatment group( n = 36) and control group( n = 37). The control group received conventional Western medicine treatment,while the treatment group received Huxinkang tablets as well as the conventional Western medicine treatment. After four weeks of treatment,the clinical outcom...