An official website of the United States government
Here's how you know
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.
At 6:15 a.m., a few ventricular premature beats with very short coupling intervals occurred, without prolongation of the QTc interval. Two of them initiated a polymorphic VT. The first episode (a, top) terminated spontaneously while the second one (b, bottom) deteriorated to VF.