二维斑点追踪成像对肺动脉高压患者右室长轴收缩功能的诊断价值

目的探讨二维斑点追踪成像(2D-STI)对肺动脉高压(PH)患者右室长轴收缩功能的临床应用价值。方法 45例PH患者(PH组)和30例体检健康者(对照组)使用2D-STI对其行心尖四腔心切面探查,获取右室游离壁及室间隔长轴6节段的收缩期峰值应变(PSS)及收缩期峰值应变达峰时间(PSST)。结果 PH组右室游离壁的基底段、中间段、心尖段及室间隔中间段、心尖段PSS均小于对照组(均P0.05),而两组室间隔基底段的PSS差异无统计学意义。PH组右室长轴PSST为(73.22±37.64)ms,较对照组(38.13±17.12)ms延长(P0.05)。结论 2D-STI技术可准确评估右室整体及节段收缩功能及同步性,是评价右室功能简便、快捷的新方法。     

三维斑点追踪技术评价阻塞性睡眠呼吸暂停综合征患者左心室收缩功能

目的应用三维斑点追踪技术评价阻塞性睡眠呼吸暂停综合征(OSA)患者左心室收缩功能。方法应用三维斑点追踪技术对经昼夜多导睡眠监测仪确诊的OSA患者[根据睡眠呼吸暂停指数(AHI)>5次/h]39例和所有检测指标正常的正常对照组45例进行左心室心肌斑点追踪分析,比较两组的BMI、左心室射血分数(LVEF)及左心室三维应变指标,并且分析比较AHI、BMI与三维应变指标之间的相关性。结果 (1)与正常人比较,OSA患者的BMI、左心室舒张末期容积(EDV)、左心室收缩末期容积(ESV)均明显增大(P<0.05);OSA患者左心室三维环向、径向应变值较正常人有明显减小(P<0.05);(2)相关性分析:BMI与EDV、ESV、长轴应变、径向应变、扭转、扭转度有较好的相关性:EDV(r=0.523,P<0.01),ESV(r=0.617,P<0.01),长轴(r=-0.402,P<0.01),环向(r=-0.284,P>0.05),径向应变(r=-0.423,P<0.01),扭转(r=-0.370,P<0.05),扭矩(r=-0.419,P<0.01)。结论三维应变参数能够敏感反映OSA患者左心功能改变,其中三维环向及径向应变能够在患者LVEF发生改变之前反映心功能的变化且左心功能的改变与BMI有关。     

Healing process of myocardial edema in acute perimyocarditis: Observation by speckle-tracking echocardiography and cardiac magnetic resonance parametric mapping

This report describes the case of a 42-year-old male patient with acute viral perimyocarditis. The case study serves as a demonstration of the use of speckle-tracking echocardiography and cardiac magnetic resonance (CMR) imaging in monitoring myocardial changes associated with perimyocarditis. It explores the possibility that regional longitudinal strain (LS) may predict prognosis in the affected areas of the myocardium, and could reflect more advanced areas of myocyte damage within myocardial edema.     

Assessment of Early Diastolic Intraventricular Pressure Difference in Children by Blood Speckle-Tracking Echocardiography

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