新生儿缺氧缺血性脑病合并心肌损伤血浆N端脑利钠肽前体的变化及与预后的相关性

目的 探讨N端脑利钠肽前体(NT-proBNP)在缺氧缺血性脑病(HIE)合并心肌损伤患儿中的变化,为临床早期诊断、治疗及预后判断提供依据.方法 选择我院收住的40例HIE患儿为研究对象(心肌损伤16例,非心肌损伤24例),以20例正常新生儿为对照组,应用ELISA方法测定血浆NT-proBNP水平;超声心动图测定患儿的心脏收缩功能.结果 (1)心肌损伤患儿NT-proBNP水平[(350±56)pmol/L]显著高于非心肌损伤组[(135±37)pmol/L]和正常对照组[(117±23)pmol/L],差异有统计学意义(P＜0.05);(2)轻、中、重度HIE组NT-proBNP水平分别为(132±34)pmol/L、(247±43)pmol/L和(343±53)pmol/L,中、重度HIE组显著高于对照组;轻、中、重度HIE组间比较差异有统计学意义(P＜0.05);(3)心肌损伤组急性期血浆NT-proBNP水平[(350±56)pmol/L]明显高于恢复期[(250±78)pmoyl/L],差异有统计学意义(P＜0.05);(4)HIE患儿NT-proBNP水平和肺动脉收缩压、左室收缩功能密切相关.结论 HIE合并心肌损伤急性期血浆NT-proBNP水平升高,有助于早期诊断心肌损伤,判断HIE病情.

Abstract：

Objective To investigate the changes of N-terminal pro-brain natriuretic peptide (NT-proBNP) in neonates with hypoxic-ischemic encephalopathy (HIE) complicated by myocardial ischemic injury. Methods Forty neonates with HIE ( 16 cases with concurrent myocardial injury and 24 cases without) were enrolled. Twenty healthy neonates were used as control. Plasma NT-proBNP levels were measured using enzyme immunoassay. Cardiac function was measured by echocardiography. Results ( 1 ) The mean plasma NT-proBNP levels in patients with myocardial injury[(350 ± 56) pmol/L]were significantly higher than those in patients without myocardial injury[(135 ± 37 ) pmol/L]and in the control group [(117 ±23) pmol/L](P ＜0. 05). (2) The NT-proBNP levels in mild,moderate and severe HIE neonates were ( 132 ±34) pmol/L, (247 ±43) pmol/L and (343 ±53) pmol/L. Compared with the control group,the NT-proBNP levels in the neonates with moderate and severe HIE significantly increased. There were significant differences in the NT-proBNP levels among the mild, moderate and severe HIE neonates ( P ＜ 0. 05 ).(3) In patients with myocardial injury,the NT-proBNP levels significantly decreased in the convalescent phase [(250±78) pmol/L]compared with those in the acute phase[(350±56) pmol/L](P ＜0.05). (4) The NT-proBNP levels were significantly related with left ventricular ejection fraction. Conclusion Plasma NT-proBNP levels increase in neonates with HIE complicated with myocardial ischemic injury in the acute phase.Detection of NT-proBNP levels maybe useful in the diagnosis of myocardial ischemic injury and severe HIE.

Change and prognosis prediction of N-terminal pro-brain natriuretic peptide in neonates with hypoxic-ischemic encephalopathy complicated with myocardial ischemic injury

Objective To investigate the changes of N-terminal pro-brain natriuretic peptide (NT-proBNP) in neonates with hypoxic-ischemic encephalopathy (HIE) complicated by myocardial ischemic injury. Methods Forty neonates with HIE ( 16 cases with concurrent myocardial injury and 24 cases without) were enrolled. Twenty healthy neonates were used as control. Plasma NT-proBNP levels were measured using enzyme immunoassay. Cardiac function was measured by echocardiography. Results ( 1 ) The mean plasma NT-proBNP levels in patients with myocardial injury[(350 ± 56) pmol/L]were significantly higher than those in patients without myocardial injury[(135 ± 37 ) pmol/L]and in the control group [(117 ±23) pmol/L](P ＜0. 05). (2) The NT-proBNP levels in mild,moderate and severe HIE neonates were ( 132 ±34) pmol/L, (247 ±43) pmol/L and (343 ±53) pmol/L. Compared with the control group,the NT-proBNP levels in the neonates with moderate and severe HIE significantly increased. There were significant differences in the NT-proBNP levels among the mild, moderate and severe HIE neonates ( P ＜ 0. 05 ).(3) In patients with myocardial injury,the NT-proBNP levels significantly decreased in the convalescent phase [(250±78) pmol/L]compared with those in the acute phase[(350±56) pmol/L](P ＜0.05). (4) The NT-proBNP levels were significantly related with left ventricular ejection fraction. Conclusion Plasma NT-proBNP levels increase in neonates with HIE complicated with myocardial ischemic injury in the acute phase.Detection of NT-proBNP levels maybe useful in the diagnosis of myocardial ischemic injury and severe HIE.