Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Variations of the total velocity magnitude (solid line), normal velocity magnitude (dashed), and ratio of in-plane to total velocities (dotted) over a cardiac cycle. Velocity values are in (m/s), and the ratio (right vertical axis) is expressed as a percentage.
