Abstract:Objective To investigate the effect of Ticagrelor on plasma copeptin in patients with acute coronary syndrome (ACS) after percutaneous coronary intervention (PCI) and its clinical significance. Methods Totally 186 ACS patients who received PCI in the First People′s Hospital of Foshan from January 2015 to June 2017 were randomly divided into an observation group and a control group according to the order of admission, each group had 93 cases. After PCI, the patients in the observation group were treated with aspirin and Ticagrelor, while those in the control group were treated with aspirin and Clopidogrel. The incidences of adverse cardiovascular events and adverse reactions in the two groups were observed within 6 m after PCI. Their serum N-terminal probrain natriuretic peptide (NT-proBNP), platelet count, and platelet maximum aggregation rate were tested before PCI, at 3 and 6 m after PCI. And fasting blood glucose, blood sodium, blood potassium, urea nitrogen and plasma copeptin levels were determined before PCI and at 6 m after PCI; plasma crystal osmotic pressure were calculated. Correlation between plasma copeptin and plasma crystal osmotic pressure were analyzed. The change rates of plasma copeptin in the patients with adverse cardiovascular events and the patients without adverse cardiovascular events were compared. Results The incidences of adverse cardiovascular events within 6 m after PCI in the observation group were significantly higher than those in the control group (P < 0.05). Before PCI, NT-proBNP, platelet count, platelet aggregation rate, fasting blood glucose, blood sodium, blood potassium, urea nitrogen, plasma crystal osmotic pressure and plasma copeptin were not significantly different between the two groups (P > 0.05). At 3 and 6 m after PCI, NT-proBNP and platelet aggregation rate in the observation group were significantly lower than those in the control group (P < 0.05). At 6 m after PCI, fasting blood glucose, blood potassium, plasma crystal osmotic pressure and plasma copeptin in the observation group were significantly lower than those in the control group (P < 0.05). There was a positive correlation between plasma crystal osmotic pressure and plasma copeptin level (P < 0.05). The change rate of plasma copeptin in the patients with adverse cardiovascular events was significantly lower than that in the patients without adverse cardiovascular events (P < 0.05). Conclusions For ACS patients, use of Ticagrelor after PCI can better inhibit the plasma copeptin level.