Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome

Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome
Pre-excitation, Atrioventricular Reentrant (reentry) Tachycardia (AVRT) and Wolff-Parkinson-White (WPW) syndrome: ECG, clinical characteristics and management Pre-excitation The atrioventricular node and  bundle of His  are normally the only communication between the atria and the ventricles. The atrial impulse must pass through the atrioventricular node, which delays the impulse due to its slow conduction, before the impulse may reach the ventricles. The physiological advantages of this configuration has been discussed in Chapter 1. Some individuals, however, possess an additional pathway between the atria and the ventricles. Such pathways may be conductive, such that they can transmit the atrial impulse to the ventricles directly. These pathways are termed  accessory pathways  (or  bundle of Kent ). They are remnants of the embryological development of the heart. Accessory pathways (Kent’s bundle) may be able to conduct the impulse from the atria to the ventricles ( antegrade direction ), fro…

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