2025 , Vol. 22 >Issue 04: 360 - 367
DOI: https://doi.org/10.3877/cma.j.issn.1672-6448.2025.04.012
自动心肌运动定量技术对支原体肺炎患儿左心室收缩功能的评估及与肺炎支原体DNA载量的关系
Copy editor: 汪荣
收稿日期: 2024-12-24
网络出版日期: 2025-06-09
基金资助
湖南省卫生健康委员会科研项目(202109021022)
版权
Correlation of left ventricular systolic function assessed by automated cardiac motion quantification in children with mycoplasma pneumonia with alveolar mycoplasma DNA levels
Received date: 2024-12-24
Online published: 2025-06-09
Copyright
目的
探讨超声心动图自动心肌运动定量(aCMQ)技术评估肺炎支原体肺炎(MPP)患儿左心室收缩功能的价值,以及aCMQ 参数与肺泡灌洗液肺炎支原体DNA(BALF MP-DNA)载量的相关性。
方法
回顾性纳入2023 年10 月至2024 年6 月湖南省人民医院天心阁院区儿童医学中心收治的56 例MPP 患儿为病例组,并选取儿童保健及正常体检的儿童51 例作为对照组。56 例MPP 患儿根据血清心肌超敏肌钙蛋白I(hs-CTnI)是否异常分为MPP-A 组(hs-CTnI 异常)37 例、MPP-B 组(hs-CTnI 正常)19 例。测定3 组的常规超声心动图指标,并运用aCMQ 技术测定左心室心肌应变指标,比较3 组间各指标的差异,采用ROC 曲线评估左心室应变指标的诊断效能,并分析相关指标与BALF MP-DNA 载量的相关性。
结果
3 组的常规超声心动图指标比较,差异均无统计学意义(P 均>0.05)。MPP-A 组的左心室纵向应变指标[左心室整体纵向应变(LVGLS)、心尖四腔心纵向应变(AP4LS)、心尖三腔心纵向应变(AP3LS)及心尖两腔心纵向应变(AP2LS)]均低于MPP-B 组及对照组,差异均有统计学意义(P 均<0.05),MPP-B 组与对照组的LVGLS、AP4LS、AP3LS、AP2LS 差异均无统计学意义(P 均>0.05)。3 组的左心室环向应变指标[左心室整体环向应变(LVGCS)、短轴基底段环向应变(SAXBCS)、短轴中间段环向应变(SAXMCS)及短轴心尖段环向应变(SAXACS)]比较,差异均无统计学意义(P 均>0.05)。LVGLS、AP4LS、AP3LS、AP2LS 预测MPP 患儿早期左心室收缩功能受损的ROC 曲线下面积(AUC)分别为0.929、0.784、0.840、0.852,其中LVGLS 的预测价值优于其他3 项指标(P 均<0.05)。MPP 患儿MP-DNA 载量与LVGLS、AP2LS、AP3LS、AP4LS 的绝对值均呈线性负相关(r =-0.453、-0.443、-0.429、-0.347,P 均<0.05)。
结论
aCMQ 技术中各左心室纵向应变指标均能较准确、客观地评估MPP 患儿左心室收缩功能,其中LVGLS 对MPP 患儿心肌损伤的评估具有更高的临床应用价值。左心室纵向应变指标与BALF MP-DNA 载量存在相关性,为MPP 对心血管系统影响的机制解释提供了新的视角。
关键词: 自动心肌运动定量技术; 斑点追踪技术; 超声心动图; 支原体肺炎; 左心室收缩功能
谭品 , 谢娟娟 , 龙湘党 , 敖琨 , 张萍 , 袁勇华 . 自动心肌运动定量技术对支原体肺炎患儿左心室收缩功能的评估及与肺炎支原体DNA载量的关系[J]. 中华医学超声杂志(电子版), 2025 , 22(04) : 360 -367 . DOI: 10.3877/cma.j.issn.1672-6448.2025.04.012
Objective
To evaluate the left ventricular systolic function in children with mycoplasma pneumoniae pneumonia (MPP) using echocardiographic automated cardiac motion quantification (aCMQ)technology, and to explore its correlation with the load of mycoplasma pneumoniae DNA in bronchoalveolar lavage fluid (BALF MP-DNA).
Methods
A retrospective study was conducted on 56 children with MPP admitted to the Children's Medical Center of Tianxin Pavilion, Hunan Provincial People's Hospital, from October 2023 to June 2024.Additionally, 51 children undergoing routine health check-ups or normal physical examinations were selected as controls.The 56 MPP children were further divided into two subgroups based on the presence or absence of abnormal serum high-sensitivity cardiac troponin I (hs-CTnI): MPP-A group consisted of 37 children with abnormal hs-CTnI levels, and MPP-B group included 19 children with normal hs-CTnI levels.Routine echocardiographic parameters were measured in all the three groups, and left ventricular myocardial strain indices were assessed using aCMQ technology.Differences in these indices among the three groups were compared.The diagnostic efficacy of left ventricular strain indices was evaluated using receiver operating characteristic (ROC)curves, and the correlation between these indices and BALF MP-DNA load was analyzed.
Results
There were no significant differences in routine echocardiographic parameters among the three groups (all P>0.05).The left ventricular longitudinal strain indices [global longitudinal strain (LVGLS), apical four-chamber longitudinal strain(AP4LS), apical three-chamber longitudinal strain (AP3LS), and apical two-chamber longitudinal strain (AP2LS)]in the MPP-A group were significantly lower than those of the MPP-B group and the control group (all P<0.05).However, no significant differences were observed in these indices between the MPP-B group and the control group (all P>0.05).Similarly, no significant differences were found in left ventricular circumferential strain indices [global circumferential strain (LVGCS), basal short-axis circumferential strain (SAXBCS), mid short-axis circumferential strain (SAXMCS), and apical short-axis circumferential strain (SAXACS)] among the three groups(all P>0.05).LVGLS, AP4LS, AP3LS, and AP2LS all demonstrated the ability to predict early left ventricular systolic dysfunction in MPP children, with area under the curve (AUC) values of 0.929, 0.784, 0.840, and 0.852,respectively.Among them, LVGLS exhibited the highest predictive value (P<0.05).The MP-DNA load in MPP children was linearly and negatively correlated with the absolute values of LVGLS, AP2LS, AP3LS, and AP4LS(r =-0.453, -0.443, -0.429, and -0.347, respectively, all P<0.05).
Conclusion
The left ventricular longitudinal strain indices obtained using aCMQ technology can accurately and objectively evaluate left ventricular systolic function in MPP children.Among these indices, LVGLS holds higher clinical value for assessing myocardial injury in MPP children.The correlation between left ventricular longitudinal strain index and BALF MP-DNA load provides a new perspective for explaining the mechanism of MPP's impact on the cardiovascular system.
表1 MPP 病例组与对照组一般临床资料比较[M(Q1,Q3)] |
组别 | 例数 | 男性[ 例(%)] | 年龄(岁, ± s ) | BMI(kg/cm2) | 心率(次/min) | 体温(℃) | LDH(U/L) | CK-MB(U/L) | hs-CTnI(ng/ml) |
---|---|---|---|---|---|---|---|---|---|
MPP-A 组 | 37 | 20(54.1) | 8.00±2.48 | 15.7(14.6,19.1) | 110(86,118)a | 36.9(36.5,37.6)a | 349.7(291.2,454.4)a | 30.0(17.0,45.0)a | 0.020(0.016,0.030) |
MPP-B 组 | 19 | 8(42.1) | 7.26±1.73 | 16.5(14.6,19.1) | 99.5(84.2,110.8)a | 36.7(36.7,37.7)a | 304.4(265.9,403.5)a | 24.5(15.0,36.1)a | 0.005(0.003,0.009) |
对照组 | 51 | 30(58.8) | 8.43±3.00 | 16.0(14.9,18.5) | 77(69,83) | 36.5(36.2,36.5) | 198.0(169.0,209.0) | 15(13,16) | |
统计值 | χ 2=1.559 | F=1.693 | H=0.541 | H=47.929 | H=33.851 | H=75.495 | H=22.925 | Z=-6.092 | |
P值 | 0.471 | 0.193 | 0.462 | < 0.001 | < 0.001 | < 0.001 | < 0.001 | <0.001 |
注:MPP 为肺炎支原体肺炎;BMI 为体质量指数;LDH 为乳酸脱氢酶;CK-MB 为肌酸激酶同工酶;hs-CTnI 为超敏心肌肌钙蛋白I;MPP-A组为超敏心肌肌钙蛋白I 异常的肺炎支原体肺炎患儿;MPP-B 组为超敏心肌肌钙蛋白I 正常的肺炎支原体肺炎患儿;与对照组比较,aP<0.001 |
表2 MPP 病例组与对照组常规超声心动图参数比较[M(Q1,Q3)] |
组别 | 例数 | LVIDd(mm) | LVIDs(mm) | IVSd(mm) | LVPWd(mm) | LVEF(%) |
---|---|---|---|---|---|---|
MPP-A 组 | 37 | 37.00(34.00,38.00) | 22.00(22.00,24.00) | 5.80(5.50,6.20) | 5.90(5.60,6.20) | 68.00(64.00,70.00) |
MPP-B 组 | 19 | 37.00(35.00,39.75) | 23.50(22.00,25.75) | 6.00(5.60,6.50) | 6.00(5.80,6.30) | 69.00(66.00,70.00) |
对照组 | 51 | 38.00(35.00,41.00) | 24.00(22.00,26.00) | 6.10(5.60,6.50) | 6.00(5.50,6.50) | 68.00(66.00,70.00) |
H值 | 3.094 | 2.692 | 2.232 | 1.348 | 0.860 | |
P值 | 0.213 | 0.271 | 0.260 | 0.510 | 0.650 |
注:MPP 为肺炎支原体肺炎;LVIDd 为左心室舒张末期内径;LVIDs 为左心室收缩末期内径;IVSd 为舒张末期室间隔厚度;LVPWd 为舒张末期左心室后壁厚度;LVEF 为左心室射血分数;MPP-A 组为超敏心肌肌钙蛋白I 异常的肺炎支原体肺炎患儿;MPP-B 组为超敏心肌肌钙蛋白I 正常的肺炎支原体肺炎患儿 |
表3 MPP 病例组与对照组aCMQ 左心室纵向应变指标比较(%, |
组别 | 例数 | AP4LS | AP3LS | AP2LS | LVGLS |
---|---|---|---|---|---|
MPP-A 组 | 37 | -20.91±1.22 a | -20.27±1.39 a | -20.21±1.53 a | -20.19±1.13 a |
MPP-B 组 | 19 | -23.09±1.34 | -22.94±1.77 | -23.36±1.82 | -23.10±1.23 |
对照组 | 51 | -23.27±1.89 | -23.79±1.74 | -23.79±2.22 | -23.63±1.10 |
F值 | 25.571 | 51.005 | 38.906 | 103.752 | |
P值 | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
注:MPP 为肺炎支原体肺炎;aCMQ 为自动心肌运动定量;AP4LS 为四腔心纵向应变;AP3LS 为三腔心纵向应变;AP2LS 为两腔心纵向应变;LVGLS 为左心室整体纵向应变;MPP-A 组为超敏心肌肌钙蛋白I 异常的肺炎支原体肺炎患儿;MPP-B 组为超敏心肌肌钙蛋白I 正常的肺炎支原体肺炎患儿;与MPP-B 组、对照组比较,aP<0.001 |
表4 MPP 病例组与对照组aCMQ 左心室环向应变指标比较[%,M(Q1,Q3)] |
组别 | 例数 | SAXBCS | SAXMCS | SAXACS | LVGCS |
---|---|---|---|---|---|
MPP-A 组 | 37 | -29.95(-29.25,-31.10) | -29.55(-28.90,-30.60) | -30.30(28.90,33.45) | -29.95(-29.30,-31.10) |
MPP-B 组 | 19 | -29.10(-28.75,-30.30) | -29.80(-28.60,-32.05) | -29.00(-28.30,-30.45) | -28.80(-29.40,-30.65) |
对照组 | 51 | -29.80(-28.40,-32.30) | -30.30(-29.10,-32.00) | -31.10(-29.10,-34.50) | -30.40(-29.40,-32.10) |
H值 | 0.990 | 0.947 | 1.583 | -1.594 | |
P值 | 0.375 | 0.391 | 0.210 | 0.331 |
注:MPP 为肺炎支原体肺炎;aCMQ 为自动心肌运动定量;SAXBCS 为短轴基底段环向应变;SAXMCS 为短轴中间段环向应变;SAXACS 为短轴心尖段环向应变;LVGCS 为左心室整体环向应变;MPP-A 组为超敏心肌肌钙蛋白I 异常的肺炎支原体肺炎患儿;MPP-B 组为超敏心肌肌钙蛋白I 正常的肺炎支原体肺炎患儿 |
图3 左心室纵向应变指标评估肺炎支原体肺炎患儿左心室心肌受损的ROC 曲线注:AP4LS 为四腔心纵向应变;AP3LS 为三腔心纵向应变;AP2LS 为两腔心纵向应变;LVGLS 为左心室整体纵向应变 |
表5 左心室纵向应变指标评估MPP 患儿左心室心肌受损的ROC 曲线结果 |
应变指标 | AUC | 95%CI | P值 | 敏感度 | 特异度 | 最佳截断值(%) |
---|---|---|---|---|---|---|
AP4LS | 0.784 | 0.654 ~ 0.883 | < 0.001 | 0.622 | 0.842 | -21.55 |
AP3LS | 0.840 | 0.718 ~ 0.924 | < 0.001 | 0.757 | 0.737 | -20.15 |
AP2LS | 0.852 | 0.732 ~ 0.933 | < 0.001 | 0.811 | 0.842 | -20.45 |
LVGLS | 0.929 | 0.827 ~ 0.980 | < 0.001 | 0.919 | 0.789 | -20.30 |
注:MPP 为肺炎支原体肺炎;AP4LS 为四腔心纵向应变;AP3LS 为三腔心纵向应变;AP2LS 为两腔心纵向应变;LVGLS 为左心室整体纵向应变;AUC 为曲线下面积 |
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