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 angiography, systole; (B) left ventricular angiography, diastole; (C) electrocardiogram (upper level) and left ventricular pressure recording (lower level), time scale on top right. Arrow: left ventricular end-diastolic pressure.
