An official website of the United States government
Here's how you know
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.
Tissue velocity map in an in vivo human volunteer heart superimposed on the B-mode image for three configurations 1, 3, 5 diverging waves during the Q wave (a),(b),(c). The tissue velocity at one point of space (green arrow) is plotted against time for the three configurations (d).