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.
Representative echocardiographic graphs in 2D parasternal long axis view and M-mode of the left ventricle (LV) at the level of the papillary muscles. N is 8–15 in each group.
