概括
心声扫描显示左心室 (LV) 尺寸与儿童的体重增加. 关键的LV功能指数,如%deltaLVD和PEP/LVET比率,在整个儿童时期保持稳定.
科学领域:
- 儿童心脏病学 儿童心脏病学
- 心声回声扫描 (Echocardiography) 是一种心声回声扫描.
- 心血管生理学心血管生理学
背景情况:
- 评估左心室 (LV) 的大小和功能在儿科心脏病学中至关重要.
- 在健康儿童中确定LV参数的规范性数据对于诊断心脏异常至关重要.
研究的目的:
- 通过心声学,在一群健康儿童中描述正常的左心室 (LV) 尺寸和功能.
- 确定可靠的LV功能回声心脏学指数,在整个儿童时期保持不变.
主要方法:
- 对145名正常儿童进行了心声扫描,以测量LV终端-透气直径 (EDD),缩的百分比变化 (%deltaLVD) 和周围纤维缩短的平均速度 (Vcf).
- 使用大动脉运动记录了LV前喷射期 (PEP) 和喷射时间 (LVET).
- 统计分析将LV参数与体重,身体表面积,年龄和心率相关联.
主要成果:
- LV 末端透气直径 (EDD) 与日志体重 (r=0.95) 和日志身体表面积 (r=0.96) 有着强烈的相关性,在儿童时期增加了三倍.
- %deltaLVD是LV功能的指数,始终在36%左右,不依赖年龄和心率.
- 发现PEP/LVET比率相对独立于年龄和心率,平均为0.31.
结论:
- 左心室 (LV) 尺寸随着生长显著增加,与儿童的体重和表面积有很强的相关性.
- %deltaLVD和PEP/LVET比率是儿童左心室 (LV) 功能强大可靠的心声学指数,在不同年龄段显示稳定性.
- 这些稳定指数为监测儿科心脏健康和检测功能异常提供了宝贵的工具.
相关概念视频
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