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 ...

Background: Symptomatic prolonged sinus pauses on termination of atrial fibrillation ... permanent pacemaker is often implanted. Recent human studies have observed improved sinus node function ...

This indicates that the pacemaker is coming from the sinus node and not elsewhere in the atria, with an atrial rate of greater than 100 beats per minute. The ventricular rate (indicated by the QRS ...

Class III conditions are those in which it is generally agreed that a pacemaker should not be implanted. The use of pacing therapy for sinus node ... atrial rates (atrial fibrillation, atrial ...

The first is that the heart's natural pacemaker - an area known as the sinus node which generates the electrical waves making the heart beat - wears out. The second major reason is a condition ...

The sinus node is the heart's "natural pacemaker" that starts the hearbeat. But when the sinus node fails, there are backup pacemakers in the AV node (responsible for junctional rhythm ...

creates action potentials faster than the sinus node. This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is ...