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1、NT-脑钠肽在左心功能不全诊断中的价值作者:王光耀,何汉康,陈剑,周栋,韩明华【摘要】 目的探讨N末端脑钠肽(NT-BNP)在心功能不全诊断中的价值。方法对81例NYHAⅠ、Ⅱ、Ⅲ、Ⅳ级器质性心脏病患者,在入院治疗前抽肘静脉血,用酶免疫测定法测定NT-BNP;正常人36例为对照组,在体检时抽血检测NT-BNP。抽血当天超声心动图评估心功能不全时的相关指标,左室射血分数(LVEF)、左室舒张末径以及肺动脉压。结果对照组、Ⅰ、Ⅱ、Ⅲ、Ⅳ级器质性心脏病患者NT-BNP中位数依次为26.6、70、151.2
2、、2724.1、7728.7pg/ml,NT-BNP对数均值为(1.5±0.4)、(2±0.4)、(2.3±0.5)、(3.3±0.6)、(3.8±0.5),单因数方差分析差异有显著性(P<0.01),若以256pg/ml为诊断左心衰临界值,其敏感性为97%,特异性为85%。NT-BNP与NYHA分级心脏功能指标的相关系数为(r=0.456,P<0.01)。诊断左心功能不全NT-BNP比心脏彩超有更高的敏感性和特异性。结论NT-BNP是诊断左心衰竭快速、简便、敏感、特异的指标,也可用于判断
3、左心衰竭严重程度。NT-BNP与肺动脉压有相互关系,测定NT-BNP并通过临床分析可为正确诊断心肺疾病提供有价值的信息。【关键词】N末端脑钠肽心室功能障碍左诊断 ClinicalvalueofN-terminalproBNPindiagnosisofleft11heartfailure WANGGuang-yao,HEHan-kang,CHENJian,ZHOUDong,HANMing-hua (CardiologyDepartment,LiuzhouTraditionalChineseMedi
4、cineHospital,Liuzhou,Guangxi545001,China;CardiologyDepartment,theFirstAffiliatedHospitalofKunmingMedicalCollege,Kunming,Yunnan650031,China) Abstract:ObjectiveToevaluatetheclinicalvalueofN-terminalproBNP(NT-BNP)indiagnosisofleftheartfailure.MethodsAccor
5、dingtoNYHAclassification,81patientswithheartdiseaseweredividedintofourgroups,15,26,22and18casesingradesI,Ⅱ,ⅢandIV,respectively.36healthyindividualswereselectedascontrolgroup.NT-proBNPwasdetectedusingenzyme-immunoassaymethodinallsubjects.Meanwhile,correl
6、atedheartfailureindexessuchasleftventricularejectionfraction(LVEF),leftventriculardiastolicenddiameter(LVDD)andpulmonaryarterialpressureweredeterminedbyechocardiograph.ResultsThemedianNT-BNPincontrolgroup,patientswithNYHAgradesI,Ⅱ,Ⅲ,andIVwere26.6,70,111
7、51.2,2724.1,and7728.7pg/ml,andtheirlogarithmictransformationwere(1.5±0.4),(2±0.4),(2.3±0.5),(3.3±0.6)and(3.8±0.5),therewasstatisticalsignificantdifference(P<0.01).256pg/mlwasthebestcriticalpointfordiagnosingheartfailurewith97%sensitivityand85%specifi
8、city.ThecorrelationcoefficientofNT-proBNPwithNYHAfunctionalclassificationwas(r=0.456,P<0.01).NT-BNPhasbettersensitivityandspecificitythancolorDopplerultrasonographyindiagnosingleftheartfailure.ConclusionNT-BNPisaquick,convenie