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.
A left ventricular pressure–volume (PV) loop in red illustrating severe systolic left heart failure with an ejection fraction of about 20%. Normal PV loop in gray. End-systolic and end-diastolic pressure volume relations indicated with gray curves. The curved part of the end-systolic line at high volumes represents overstretching of left ventricular myocardium.
