Objective To study and analyze the relationship between the blood stasis syndrome of acute coronary syndrome and RAAS system and microcirculation,in order to provide monitoring basis for the treatment of this disease. Methods 52 cases of patients with blood stasis syndrome of acute coronary syn-drome in our hospital from January 2013 to November 2015 were selected as group A,and 52 cases of patients with acute coronary syndrome and without blood stasis syndrome were selected as group B,52 healthy persons were selected as group C,then the serum RAAS indexes and nail fold microcirculation indexe...