What is reentrant tachycardia?

What is reentrant tachycardia?

Atrioventricular nodal reentrant tachycardia (AVNRT) is a regular supraventricular tachycardia (SVT) that results from the formation of a reentry circuit confined to the AV node and perinodal atrial tissue. Because of its abrupt onset and termination, AVNRT is categorized as a paroxysmal SVT (PSVT).

Is SVT A reentrant tachycardia?

Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common kind of supraventricular tachycardia (SVT) due to an extra electrical pathway. SVT is a heart condition that makes the heart suddenly beat much faster than normal.

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 are the two main types of re entrant cardiac rhythms?

There are two broad categories of reentrant tachycardias based on where in the heart they occur: supraventricular tachycardias (SVT); and ventricular tachycardias (VT), including ventricular fibrillation (VF).

What is reentry in cardiac arrhythmia?

A reentry arrhythmia is a self-sustaining cardiac rhythm abnormality in which the action potential propagates in a manner analogous to a closed-loop circuit. It is a disorder of impulse conduction and is discrete from disorders of impulse generation such as automaticity or triggered activity.

What is AV node 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.

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.

What is reentry phenomenon?

When does reentry occur?

Space debris is human-made and comes from objects that people launched into Earth orbit. It is usually moving parallel to the ground, at a speed of about 7 km/sec or 17,500 miles per hour. The reentry can occur at any time of the day.

What is the difference between WPW and SVT?

What is SVT? Supraventricular tachycardia (SVT) refers to a group of abnormal fast heart rhythms that arise because of a problem involving the upper chambers of the heart. WPW is short for Wolf-Parkinson White syndrome which is a special form of SVT.

What is AVNRT ECG?

Atrioventricular nodal reentrant tachycardia is the most common form of paroxysmal supraventricular tachycardia, or PSVT, in adults. AVNRT occurs when a reentrant circuit is present within the AV node itself.

What are AV node blockers?

The medications known as AV nodal blocking drugs—beta blockers, calcium channel blockers, and digoxin—work by slowing the heart’s electrical signal as it passes through the AV node on its way from the atria to the ventricles. This makes the AV nodal blocking drugs useful in treating SVT.

What is AV node reentry tachycardia?

What is the temperature of reentry?

3000 degrees Fahrenheit
During re-entry, the shuttle is going so fast, it compresses the air ahead of it. The compression of the air layers near the leading edges of the shuttle is quick, causing the temperature of the air to rise to as high as 3000 degrees Fahrenheit!

What happens on reentry?

During reentry, free stream air is compressed to high temperature and pressure by the entry vehicle’s shock wave. Non-equilibrium air in the shock layer is then transported past the entry vehicle’s leading side into a region of rapidly expanding flow that causes freezing.

What drugs are contraindicated in WPW?

Safe practice in SVT with WPW

Can adenosine be used in WPW?

Adenosine (Adenocard, Adenoscan) It can interrupt atrioventricular reentrant tachycardia (AVRT) by blocking conduction in the AV node to restore normal sinus rhythm in paroxysmal supraventricular tachycardia (PSVT), including PSVT associated with WPW syndrome.