What is AV reentry tachycardia?

What is AV reentry tachycardia?

Atrioventricular nodal reentry tachycardia (AVNRT) is the most common type of supraventricular tachycardia. People with AVNRT have episodes of an irregularly fast heartbeat (more than 100 beats per minute) that often start and end suddenly.

How is AV nodal reentry tachycardia treated?

Medications used to terminate symptomatic AVNRT episodes and to reduce AVNRT occurrences include beta-blockers, calcium channel blockers, and less commonly digoxin. These medications can be administered orally on a routine outpatient basis, or via intravenous route if necessary in the emergency room.

What triggers atrioventricular nodal reentrant tachycardia?

The triggers for typical AVNRT are usually premature atrial contractions and occasionally premature ventricular contractions.

What is the first line drug for treatment of atrioventricular nodal reentrant tachycardia?

Adenosine. Adenosine is the first-line drug used for termination of atrioventricular nodal reentry tachycardia (AVNRT). It is a potent purinergic blocker and generally blocks activation preferentially in the “slow pathway” of the AVNRT reentry circuit.

Is tachycardia a heart disease?

Tachycardia is an increased heart rate for any reason. It can be a usual rise in heart rate caused by exercise or a stress response (sinus tachycardia). Sinus tachycardia is considered a symptom, not a disease. Tachycardia can also be caused by an irregular heart rhythm (arrhythmia).

What is re entry phenomenon?

Re-entry ventricular arrhythmia is a type of paroxysmal tachycardia occurring in the ventricle where the cause of the arrhythmia is due to the electric signal not completing the normal circuit, but rather an alternative circuit looping back upon itself. There develops a self-perpetuating rapid and abnormal activation.

Is AVNRT life threatening?

While AVNRT is not life-threatening, it can be bothersome for some people, especially since symptoms begin and end so suddenly.

Is AVNRT considered heart disease?

In patients without structural heart disease, AVNRT is largely considered to have a benign course and is rarely associated with disabling symptoms, such as syncope.

Is metoprolol an AV nodal blocker?

Despite reducing fibrillatory rate, metoprolol does not affect AV nodal concealed conduction measurably. Our results support the assumption that the reducing effect of beta-blockers on ventricular rate during AF is due to direct prolongation of AV nodal refractoriness.

What is an AV blocked rhythm?

Heart block, also called AV block, is when the electrical signal that controls your heartbeat is partially or completely blocked. This makes your heart beat slowly or skip beats and your heart can’t pump blood effectively. Symptoms include dizziness, fainting, tiredness and shortness of breath.