Assessment of LVOT VTI in Healthy Volunteers
Reproducibility, Intra- and Inter-Observer Variability of Bedside Cardiac Ultrasound Measurements in the Assessment of Hemodynamic Parameters in Healthy Volunteers
研究概览
地位
详细说明
VTI is an echocardiographic parameter used to assess a patient's hemodynamic status. VTI reflects the distance traveled by blood ejected from the left ventricle during systole, enabling non-invasive estimation of key circulatory parameters, including stroke volume (SV) and cardiac output (CO).
Evidence suggests that even brief training combined with expert supervision allows novice operators to obtain measurements comparable to those of experienced clinicians, indicating a steep learning curve.
In this study, operators with minimal training will perform transthoracic echocardiography and measure LVOT VTI (in cm) in healthy volunteers. These measurements will subsequently be compared with those obtained by an experienced operator.
Aim: To assess the equivalence of LVOT VTI measurements obtained by minimally trained operators compared with those acquired by expert operators, as well as to evaluate inter-operator variability among participants. The findings may support the development and optimization of training programs for physicians in point-of-care echocardiography.
研究类型
注册 (估计的)
联系人和位置
学习地点
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Warsaw、波兰
- 招聘中
- Medical University of Warsaw
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接触：
- Medical University of Warsaw
- 电话号码：48 22 599 2002
- 邮箱：julia.mazurek@uckwum.pl
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接触：
- Julia Trzebicka
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参与标准
资格标准
适合学习的年龄
- 成人
- 年长者
接受健康志愿者
取样方法
研究人群
描述
Inclusion Criteria:
- Age > 18 years,
- Medical student at Medical University of Warsaw or licensed physician.
Exclusion Criteria:
- Age < 18 years,
- Prior experience in performing cardiac ultrasound examinations, including acquisition of apical five- and three-chamber views and Doppler measurements of LVOT VTI.
学习计划
研究是如何设计的？
设计细节
队列和干预
团体/队列 |
干预/治疗 |
|---|---|
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Operator without experience in cardiac ultrasound examinations
Medical student at Medical University of Warsaw or licensed physician
|
After brief training, operators will measure Velocity-Time Integral (in cm) of Left Ventricular Outflow Tract Obstruction in healthy volunteers.
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
Agreement between VTI measurements obtained by study participants and those obtained by an experienced operator.
大体时间：Day 2
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Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
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Day 2
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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Assessment of inter-observer variability (inter-operator variability) of VTI measurements performed by fellows.
大体时间：Day 2
|
Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
|
Day 2
|
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Assessment of intra-observer variability (intra-operator variability) of VTI measurements.
大体时间：Day 2
|
Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
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Day 2
|
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Assessment of time required to obtain a VTI measurement by participants.
大体时间：Day 2
|
Time (in minutes and seconds) from probe placement to successful acquisition of a valid VTI measurement.
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Day 2
|
合作者和调查者
调查人员
- 首席研究员：Julia Trzebicka, MD、Medical University of Warsaw
研究记录日期
研究主要日期
学习开始 (估计的)
初级完成 (估计的)
研究完成 (估计的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
与本研究相关的术语
其他研究编号
- KB/75/2026
计划个人参与者数据 (IPD)
计划共享个人参与者数据 (IPD)？
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