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.
EMS indicates emergency medical service; OHCA, out-of-hospital cardiac arrest; PEA, pulseless electrical activity; PM2.5, particulate matter with a ≤2.5-μm diameter; VF, ventricular fibrillation; and VT, ventricular tachycardia.
