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Atrioventricular reentrant tachycardia (AVRT), or atrioventricular reciprocating tachycardia, is a type of heart arrhythmia with an abnormally fast rhythm (tachycardia); it is classified as a type of supraventricular tachycardia (SVT).
AV-nodal reentrant tachycardia; Other names: Atrioventricular-nodal reentrant tachycardia: An example of an ECG tracing typical of uncommon AV nodal reentrant tachycardia. Highlighted in yellow is the P wave that falls after the QRS complex. Specialty: Cardiology: Symptoms: Palpitations, chest tightness, neck pulsation: Diagnostic method
AV reentrant tachycardia (AVRT) requires an accessory pathway for its maintenance. AVRT may involve orthodromic conduction (where the impulse travels down the AV node to the ventricles and back up to the atria through the accessory pathway) or antidromic conduction (which the impulse travels down the accessory pathway and back up to the atria ...
Transesophageal atrial stimulation can differentiate between atrial flutter, AV nodal reentrant tachycardia and orthodromic atrioventricular reentrant tachycardia. [25] It can also evaluate the risk in people with Wolff–Parkinson–White syndrome, as well as terminate supraventricular tachycardia caused by re-entry. [25]
Automatic junctional tachycardia is a type of tachyarrhythmia that originates in the atrioventricular node and His bundle area. It can be referred to as junctional tachycardia, focal junctional tachycardia, or Junctional Ectopic Tachycardia (JET). [10] Patients' heart rates are frequently between 200 and 250 beats per minute.
Another type of reentrant circuit, though, is atrioventricular nodal reentrant tachycardia, or AVNRT. AVNRT, just like AVRT, is a type of supraventricular tachycardia, but with AVNRT it’s in or near the AV node, which just like before contracts the ventricle and the atria every time it goes around.
The underlying anatomical causes of PSVT, specifically atrioventricular nodal reentry, involve the presence of two functionally distinct conduction pathways within the AV node and the formation of a reentrant circuit that sustains the tachycardia. [8] These pathways within the AV node are known as the fast pathway and the slow pathway. [9]
Third-degree atrioventricular block (AV block) is a medical condition in which the electrical impulse generated in the sinoatrial node (SA node) in the atrium of the heart can not propagate to the ventricles. [1] Because the impulse is blocked, an accessory pacemaker in the lower chambers will typically activate the ventricles.
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