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.
Bipolar atrial electrogram. Left and right arm leads are attached to the bipolar TOP leads. Leg limb leads are in standard position. The QRS complex (red arrow) demonstrates a regular tachycardia at cycle length of 275 ms (215 beats per minute). An atrial electrogram is present 140 ms after the QRS (black arrow) demonstrating a 1:1 ventricular:atrial ratio.
