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目的：探讨左卡尼汀治疗不稳定型心绞痛的临床疗效。方法选取2012年6月至2014年6月我科收治的不稳定型心绞痛患者226例，随机分为对照组和观察组，各113例。对照组患者给予常规治疗，观察组患者在对照组的基础上给予左卡尼汀治疗，比较两组患者的治疗效果和不良反应。结果观察组患者总有效率为95.6%，明显优于对照组的71.7%；观察组患者不良反应发生率为0.0%，明显低于对照组的8.0%，差异均有统计学意义（均 P＜0.05）。结论左卡尼汀治疗不稳定型心绞痛临床效果明显，且安全性高。“,”Objective To investigate the clinical curative effect of L-carnitine in treatment of unstable angina pectoris.Methods In 226 patients with unstable type from 2012 June to 2014 June in our department were angina, were randomly divided into control group and observation group,113 cases in each.The control group were given routine treatment,the observation group patients in the control group based on the given the Zo C Nitin treatment, compared two groups of patients with curative effect and adverse reaction.Results Patients in the observation group the total effective rate was 95.6%,significantly better than the control group of 71.7% patients in the observation group;the incidence rate of adverse reaction was 0.0%,significantly lower than 8.0% in the control group,the difference was statisticaly significant(P<0.05).Conclusion Effects of L-carnitine in treatment of unstable angina pectoris clinical effect is obvious,and the safety is high.