Atrial rhythms originate from somewhere in the Atria, but not from
the sino-atrial node.
P waves may or may not be present. When present, they may vary in
their configuration.
The inherent QRS complex looks normal in its morphology.
http://www.blaufus.com
SVT tutorial - This online program uses computer animations to explain
arrhythmia mechanisms and their associated electrocardiographic
findings for the following examples: AV node reentry, AV reentry,
atrial tachycardia, atrial flutter, and atrial fibrillation.
