Ventricular pre-excitation occurs as a result of an extranodal accessory pathway connecting the atrium with the ventricle along the AV groove. Although the baseline ECG may be normal, the common features seen are a short PR interval during normal sinus rhythm, slurring of the initial portion of the QRS complex resulting in a delta wave, a QRS duration greater than 120 ms in adults, and secondary ST and T wave changes, all of which result from a combination of eccentric accessory pathway and midline AV nodal conduction. Ventricular pre-excitation in association with a history of palpitations is named the Wolff-Parkinson-White (WPW) syndrome.
CITATION STYLE
Glover, B. M., & Brugada, P. (2016). Accessory pathway (AP) conduction. In Clinical Handbook of Cardiac Electrophysiology (pp. 135–161). Springer International Publishing. https://doi.org/10.1007/978-3-319-40818-7_5
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