抗精神病药物致代谢综合征及其组分与心电图QT间期的关系

目的 探讨抗精神病药物致代谢综合征(metabolic syndrome,MS)及其组分与心电图QT间期的关系.方法 对460例服用抗精神病药物的精神分裂症患者进行流行病学调查、身体测量、血生化指标测定及MS诊断,记录标准12导联心电图,用Bazett公式计算校正的QT间期(QTC).采用稳态模式评估法计算胰岛素抵抗指数(HOMA-IR).结果 抗精神病药物致代谢综合征人群心电图QT间期延长者124例,占27.0%,男女心电图QT间期延长检出率分别为21.7%、32.7%,差异有显著性(χ2=7.13,P<0.01).MS、HOMA-IR、中心性肥胖、高血压、高血糖、高TG、低HDL-C的检出率分别为39.3%,38.7%,35.4%,34.1%,31.3%,29.8%,27.0%.心电图QT间期延长与中心性肥胖、高血糖、高TG、胰岛素抵抗(IR)、MS及异常组分聚集有相关关系(χ2=4.95～13.63,P<0.05).结论 心电图QT间期延长与抗精神病药物所致多项代谢异常组分、代谢异常聚集及代谢综合征相关联.

Study on the relationship between QT interval and the compement of antipsychotic-induced metabolic syndrome

Objective To study the relationship between QT interval and the compements of antipsychotic-induced metabolic syndrome in schizophrenic patients. Methods Totally 460 schizophrenic patients(240 men and 220 women)aged 19～60 from the study cohort of the schizophrenic patients in treatment with antipsychotant were recruited in the study for epidemiologic examinations,involving anthropometry and measurements of blood pressure,fasting ang 2hr plasma levels of glucose and insulin and serum levels of lipid.A standard 12-lead ECG was recorded and the corrected QT (QTc)was calculated accordingly by Bazett formula.HOMA-IR index was calculated for estimating individual insulin resistance.Metabolic syndrome(MS)was diagnosed according to the definition issued by the International Diabetes Federation(IDF)in 2005.Results The prolonged QT interval was found in 124 of the 460 cases(27.0%),and the rates of prolonged QT interval being 21.7% and 32.7% in men and women respectively (χ2=7.13,P<0.01).The prevalences of MS,IR,central obesity,IFG,higher serum level of triglyceride(TG)and lower serum level of high-density lipoprotein cholesterol(HDL-C) were 39.3%,38.7%,35.4%,34.1%,31.3%,29.8% and 27.0% in schizophrenic patients population respectively.The prolonged QT interval was significantly associated with MS,IR,IFG,higher serum level of triglyceride(TG)and central obesity respectively(χ2=4.95～13.63,P<0.05).Conclusion The prolonged QT interval was significantly correlated with antipsychotic-induced metabolic syndrome(MS) and components of abnormal metabolism.