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 ...

Wandering atrial pacemaker occurs when multiple areas (ectopic foci) within the atrium generate consecutive action potentials that are all conducted to the ventricles. Thus, each QRS complex will ...

It causes late potentials, which might have predisposed these patients to ventricular ectopy. However, their predominant problem is heart block with Stokes-Adams attacks, rather than cardiac ...

(A) Fluoroscopic view of mapping catheter within the vein of Marshall at the site of the earliest atrial activation during isoproterenol-induced ectopy initiating AF. (B) Multilead intracardiac ...

Sinus rhythm resumes with increased heart rates during exercise. In an ectopic atrial rhythm, P waves are present but are a different morphology compared to the sinus P wave. Ectopic P waves are most ...

For ventricular ectopy, an instantaneous rate of >40–50 ... if the risk for potential aggravating cardiac effects due to the experimental conditions or suspected cardiac toxicity has been ...