ABSTRACT
<p><b>OBJECTIVE</b>To investigate the intervention effects of Suxiao Jiuxin Pill (SJP) on patients with acute coronary syndrome (ACS) undergoing early percutaneous coronary intervention (PCI).</p><p><b>METHODS</b>Sixty ACS patients were randomly assigned to the treatment group (treated by SJP and Western medicine) and the control group (treated by Western medicine alone), 30 in each group. Coronary arteriography and early PCI were performed in all patients. The effects of SJP on the blood flow rate, the collateral artery patency, and perioperative myocardial infarction incidence were observed.</p><p><b>RESULTS</b>The coronary blood flow rate was better in the treatment group than in the control group either pre- or post-PCI. [pre-PCI thrombolysis in myocardial infarction (TIMI) level III: 16/30 vs 11/30, P < 0.01; post-PCI TIMI level III: 14/14 vs 13/19, P < 0.05)]. In patients with ITMI level 0 - I , more patients in the treatment group had collateral artery protective function than those in the control group (5/6 vs 3/13, P < 0.05). The incidence of perioperative myocardial infarction was obviously lower in the treatment group than in the control group (8/30 vs 15/30, P < 0.05).</p><p><b>CONCLUSION</b>SJP could improve the pre- and post-PCI coronary artery flow rate, increase the collateral artery patency, and reduce the incidence of perioperative myocardial infarction of ACS patients.</p>