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.
Two-dimensional speckle-tracking echocardiography in the apical four-chamber view. (a) Strain curve and (b) strain rate curve. SRA, late diastolic longitudinal strain rate; SRE, early diastolic longitudinal strain rate; SRS, systolic longitudinal strain rate.
