B型利钠肽对心力衰竭患者心源性事件的预测价值

目的:评价B型利钠肽(BNP)对左心衰竭患者的预后预测价值.方法:使用荧光免疫的方法测定心力衰竭患者的BNP,并进行随访.主要临床终点为:心源性死亡和再入院.根据随访结果将患者分为无再发事件组(162例),心源性再入院组(47例),心源性死亡组(54例).用Kaplan-Meier法计算生存率和无心脏事件生存率,多因素分析采用COX回归分析法.结果:300例患者平均随访(9.5±5.6)个月,心源性再入院组[482.0(227.0,793.0)pg/ml]及心源性死亡组[565.0(327.3,1192.5)pg/ml]的BNP水平均显著高于无再发事件组[146.5(51.7,374.3)pg/ml)(P均＜0.001).不论单因素还是多因素分析,包括年龄、性别、纽约心功能分级(NYHA)、超声心动图所测左心房前后径、左心室舒张末内径、左心室射血分数(LVEF)及Log BNP,仅Log BNP与心源性死亡时问及心源性再入院时间独立相关.当分别引入Log BNP,性别,年龄,NYHA,LVEF和左心室舒张末内径及是否伴有心房颤动、心房扑动、室性心动过速、糖尿病共10个因素,单因素分析中:Log BNP、性别、NYHA、LVEF和室性心动过速是心源性事件发生的预测因子.但进一步COX多元回归分析中,只有Log BNP(回归系数:0.9898;P=0.002)和室性心动过速(回归系数:0.893;P=0.005)是独立相关影响因素.两者中,又以Log BNP的相关性最强.根据受试者工作特征曲线(ROC),BNP 288 pg/ml为划分有无心源性事件发生的最佳阈值点.BNP≤288 pg/ml患者的无心源性事件生存时间约是＞288 pg/ml患者的两倍(18.06个月vs 9.94个月,P=0.000).结论:BNP对心力衰竭患者的预后预测价值好.Log BNP和室性心动过速是心源性死亡、再入院事件独立相关影响因素.

The Predictive Value of B-Type Natriuretic Peptide for Cardiac Events in Patients With Chronic Heart Failure

Objective:To evaluate the clinical prognosis by blood level of B-type Natriuretic Peptide(BNP)in the patients with chronic heart failure(CHF). Methods:The blood level of BNP was examined by fluorescence immunnassay with the follow up study in CHF patients.The primary clinical end points were cardiac death and re-admission for CHF.The patients were divided into three groups according to the follow up result:event free group(n=162),cardiac re-admission group(n=47),and cardiac death group(n=54).Patients' survi...