This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is atrial tachycardia. If less than 100 beats per minute ...

Here, there is atrial bigeminy due to premature atrial complexes. Although the last QRS in lead II is slightly larger, the aberrant ventricular conduction in the premature beats is not evident in ...

If the heart rate is less than 100 beats per minute, then the rhythm is wandering atrial pacemaker, or WAP. The differential diagnosis of an irregularly irregular rhythm includes atrial ...

Patients requiring a pacemaker often have atrial fibrillation (AF), which increases the risk of thromboembolism and, consequently, the risk of morbidity and mortality. To maintain sinus rhythms ...

[30] The mortality was inversely associated with BIV% both in the presence of normal sinus and atrial paced rhythm and with AF. The greatest reduction in mortality was observed with BIV% > 98%.