Velocity Time Integral (VTI) is the area under the curve on a Pulse Wave Doppler tracing. It represents the distance blood travels during one heartbeat. In the LVOT (Left Ventricular Outflow Tract), the Doppler tracing shows velocity on the Y-axis and time on the X-axis. By calculating the area under this curve (VTI), and multiplying it by the cross-sectional area of the LVOT, you can estimate stroke volume.
We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.