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) Continuous R-R interval 90s before the event recorded by implantable loop recorder (ILR). (B) ILR recorded occurrence of torsades de pointes (TdP), manifestation of T-wave alternance (TWA) as well as beat-by-beat dynamic change of the QT (QTc) interval followed by premature ventricular contractions (PVCs) leading to polymorphic ventricular tachycardia. (C) Superimposed QT/RR relationship at the peak exercise during treadmill test (orange) and at just before TdP event (blue).
