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目的:通过将肺部超声的肺水B线与N末端B型利钠肽原(NT-proBNP)、二尖瓣舒张早期血流峰值速度与二尖瓣环舒张早期运动峰值速度比值(E/e’)进行相关性分析,探讨肺水B线诊断急性心力衰竭肺水肿的准确性.方法:纳入2016-02至2017-02期间在我院住院的急性心力衰竭患者124例,根据肺水B线总数分为轻度肺水肿组(肺水B线<15,n=33)、中度肺水肿组(15≤肺水B线<30,n=33)和重度肺水肿组(肺水B线≥30,n=58)三组.比较三组患者临床资料、心脏超声指标差异,以及肺水B线与NT-proBNP、E/e’、 左心室射血分数和肺动脉压的相关性分析,并应用受试者工作特征(ROC)曲线来评价肺水B线诊断NT-proBNP≥5000 pg/ml和E/e’≥14的敏感性和特异性.结果:三组临床资料比较显示:重度肺水肿组纽约心脏协会(NYHA)心功能分级、NT-proBNP水平、湿性啰音、肺淤血的患者比例明显高于轻度肺水肿组和中度肺水肿组(P<0.05).三组病例超声心动图检查结果比较,中度肺水肿组和重度肺水肿组的左心室射血分数明显低于轻度肺水肿组(P均<0.05);而重度肺水肿组的舒张功能指标如二尖瓣舒张早期血流峰值速度/舒张晚期血流峰值速度(E/A)、肺动脉压、E/e’均明显高于轻度肺水肿组(P<0.05).肺水B线总数与NT-proBNP、E/e’和肺动脉压均呈正相关性,而与左心室射血分数呈负相关性(r=-0.214). 肺水B线总数与NT-proBNP的相关性最好(r=0.803, P<0.001),其次为E/e’(r=0.794,P<0.001),而与肺动脉压的相关性最差(r=0.330,P<0.001).肺水B线诊断NT-proBNP≥5000 pg/ml和 E/e’≥14的临界值均为30,ROC曲线下面积分别为0.823和0.768.结论:肺水B线与NT-proBNP、E/e’具有良好的相关性,肺部超声可以较准确地评价急性心力衰竭患者的肺水肿.“,”Objectives: To analyze the relationship between lung ultrasound B line and NT-proBNP, E/e’ in order to explore the accuracy of B lines for diagnosing pulmonary edema in patients with acute heart failure (AHF). Methods: A total of 124 AHF patients admitted in out hospital from 2016-02 to 2017-02 were enrolled. According to the number of B line, patients were divided into 3 groups: Mild pulmonary edema group, patients with B line<15, Moderate pulmonary edema group, 15≤B line<30 and Severe pulmonary edema group, B line≥30. Basic clinical condition and echocardiography parameters were compared among 3 groups; relationships between B line and NT-proBNP, E/e’, EF, pulmonary artery pressure were analyzed respectively; the sensitivity and specificity for B-line diagnosing NT-proBNP≥5000 pg/ml and E/e’≥14 were evaluated by ROC curve analysis. Results: Compared with Mild and Moderate pulmonary edema groups, Severe pulmonary edema group had the severer NYHA grade, more wet rale, higher NT-proBNP level and more chest X-ray of pulmonary congestion, P<0.05. Compared with Mild pulmonary edema group, Moderate and Severe pulmonary edema groups had decreased LVEF, P<0.05; Severe pulmonary edema group showed increased diastolic function such as elevated E/A, pulmonary artery pressure and E/e’,P<0.05.B line was positively related to NT-proBNP,E/e’and pulmonary artery pressure,negatively related to EF.B line had the best correlation to NT-proBNP (r=0.803, P<0.001), the next was E/e’(r=0.794, P<0.001) and the worst was pulmonary artery pressure (r=0.330, P<0.001). The cutoff values of B line for diagnosing NT-proBNP≥5000pg/ml and E/e’≥14 were both 30, the AUC of ROC=0.823 and 0.768 respectively. Conclusions: Lung ultrasound B line had good correlation to NT-proBNP and E/e’, which could accurately assess the pulmonary edema in AHF patients.