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A 12-lead ECG showing paroxysmal supraventricular tachycardia at about 180 beats per minute. Subtypes of SVT can often be distinguished by their electrocardiogram (ECG) characteristics. Most have a narrow QRS complex, although, occasionally, electrical conduction abnormalities may produce a wide QRS complex that may mimic ventricular ...
WPW pattern with hemodynamically stability and orthodromic AVRT leading to a regular narrow complex tachycardia may be managed similarly to other regular narrow complex supraventricular tachycardias: first with vagal maneuvers followed by a trial of adenosine (first-line therapy). The 2015 ACC/AHA/HRS guidelines recommend beta-blockers or ...
Video explanation. Author: Tanner Marshall, MS Editor: Rishi Desai, MD, MPH, Tanner Marshall, MS Wolff-parkinson-white pattern, or WPW, is a type of heart arrhythmia caused by an accessory pathway, or an “extra” electrical conduction pathway connecting the atria and ventricles, or upper and lower chambers of the heart.
Mechanism of AVRT compared with other supraventricular arrhythmias. Two distinct pathways are involved: the normal atrioventricular conduction system, and an accessory pathway. During AVRT, the electrical signal passes in the normal manner from the AV node into the ventricles.
This type of tachycardia is known as a supraventricular tachycardia, because the signal causing the fast rate originates above the ventricles. The most common type of AVRT is Wolff-Parkinson-White syndrome, where the accessory pathway is called the Bundle of Kent.
Paroxysmal supraventricular tachycardia (PSVT) is a type of supraventricular tachycardia, named for its intermittent episodes of abrupt onset and termination. [3] [6] Often people have no symptoms. [1] Otherwise symptoms may include palpitations, feeling lightheaded, sweating, shortness of breath, and chest pain. [2] The cause is not known. [3]
Any narrow complex tachycardia combined with a problem with the conduction system of the heart, often termed "supraventricular tachycardia with aberrancy" A narrow complex tachycardia with an accessory conduction pathway, often termed "supraventricular tachycardia with pre-excitation" (e.g. Wolff–Parkinson–White syndrome)
In-between episodes there is normal electrical conduction in the heart. During an episode of AVRT caused by PJRT, the accessory pathway conducts electrical activity from the ventricles directly back to the atria at the end of systole, which triggers the atria to contract, and the current to pass back to the ventricles again via the atrioventricular node (AV node); see diagram.