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The aim of this study was to investigate the effect of different routes of tirofiban injection on the function of the left ventricle and the prognosis of patients with myocardial infarction (MI) treated with percutaneous coronary intervention (PCI). Ninety-five patients with MI treated with PCI were divided into two groups [coronary (n=49) and intravenous (n=46)] according to the injection route. A comparison of the left ventricular function and prognosis was made between the two groups following PCI. The success rate of PCI in the coronary group was 97.96%, which was higher than that in the intravenous group (P&lt;0.05). No significant differences were identified in the platelet count (PLT) and platelet aggregation rate (PAR) between the two groups prior to the tirofiban injection. Following the tirofiban injection, the PLT decreased markedly in both groups, with no significant differences between them. The PAR also decreased significantly in the two groups; however, the value in the coronary group was lower than that in the intravenous group (P&lt;0.05). The improvements in the thrombolysis in MI grades, left ventricular ejection fraction and left ventricular diastolic function were greater in the coronary group than those in the intravenous group (P&lt;0.05). All patients received follow-up for 30 days and the incidence of bleeding in the coronary group was lower than that in the intravenous group (P&lt;0.05). No significant differences were recorded in the recurrence rates of MI, arrhythmia, myocardial ischemia, thrombocytopenia and mortality between the two groups. In conclusion, the administration of tirofiban into the coronary artery could effectively improve the blood flow, left ventricular function and prognosis of patients with MI treated with PCI.

experimental and therapeutic medicine

Effects of different routes of tirofiban injection on the left ventricular function and prognosis of patients with myocardial infarction treated with percutaneous coronary intervention