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 ...

The result: an ectopic beat. Not all ectopic beats are the same. There are two main types: Premature atrial contractions (PACs). These are ectopic beats that happen in the upper chambers of the heart.

You might also hear it called atrial ectopic beats or atrial premature beats. They’re common, and most of the time, they don’t need treatment. Your heart has four chambers. The upper two are ...

There are two types of ectopic heartbeat: Premature atrial contractions (PAC), which originate in the upper chambers, or atria. Premature ventricular contractions (PVC), which originate in the ...

In the middle tracing, during another attack of paroxysmal tachycardia, carotid-sinus pressure abolishes the tachycardia, and abnormal ectopic beats as well as atrial fibrillation appear.

Ectopic rhythm is also known as premature atrial contraction, premature ventricular contraction, and extrasystole. When your heart experiences an early beat, a brief pause usually follows.

For example, in a select group of male aviators, a study found: "Rare, occasional, frequent and very frequent isolated atrial ectopy occurred in 72.9%, 2.6%, 2.3% and 0.3%, respectively.

The patient undergoes 24-hour Holter monitoring, which shows a sinus rhythm marked by an intermittent isolated supraventricular ectopic beat, and a period of atrial fibrillation (160-200 beats/min ...

Studies have proven that AF is initiated when an atrial ectopic beat encounters anatomical or functional obstacles that in turn trigger wavefront excitation. This specific excitation is ...

1 They occur most frequently during manipulation of the catheter in the atrium as isolated atrial ectopic beats or short bursts of paroxysmal atrial tachycardia. When the catheter enters the right ...