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.
Marked fractionation of the QRS complex in lead V2(2nd i.c. space) during positive diagnostic ajmaline test in a 20-year old man with aborted cardiac arrest and a non-diagnostic resting ECG (not shown).
