An observational study in Hemodynamic Assessment, Bedside Ultrasonography and Point of Care Ultrasound (POCUS), sponsored by Medical University of Warsaw. Recruiting at 1 site in Poland. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-22.
Sponsored by Medical University of Warsaw · Observational
Healthy subjects will have transthoracic echocardiography evaluation of Left Ventricular Outflow Tract Velocity-Time Integral (LVOT VTI) performed by operators after brief training.
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.
Medical University of Warsaw is the lead sponsor of 316 studies on the registry; 87 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Healthy volunteers without known structural heart disease, no history of atrial fibrillation, no aortic valve disease, and not pregnant.
Exclusion Criteria:
Medical student at Medical University of Warsaw or licensed physician
Other: transthoracic echocardiography
After brief training, operators will measure Velocity-Time Integral (in cm) of Left Ventricular Outflow Tract Obstruction in healthy volunteers.
Agreement between VTI measurements obtained by study participants and those obtained by an experienced operator.
Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
Time frame: Day 2
Assessment of inter-observer variability (inter-operator variability) of VTI measurements performed by fellows.
Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
Time frame: Day 2
Assessment of intra-observer variability (intra-operator variability) of VTI measurements.
Assessment using correlation coefficient, the intraclass correlation coefficient (ICC), and Bland-Altman analysis.
Time frame: Day 2
Assessment of time required to obtain a VTI measurement by participants.
Time (in minutes and seconds) from probe placement to successful acquisition of a valid VTI measurement.
Time frame: Day 2
Plan to share: Undecided
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Medical University of Warsaw