The first ECG strip below shows a P wave ... including atrial fibrillation, atrial flutter, and ventricular rhythms such as ventricular tachycardia or ventricular fibrillation — are discussed ...

Atrial tachycardia and other ectopic atrial rhythms occur when a site outside of the sinus node, but within the atria, creates action potentials faster than the sinus node. This ectopic focus ...

Background: Only a few algorithms for predicting the site of origin of focal atrial tachycardia ... were collected during tachycardia and sinus rhythm in 61 patients who received successful ...