Narrow QRS Tachycardia: Orthodromic Atrioventricular Reentrant Tachycardia Using an Accessory AV Connection in Wolff-Parkinson-White Syndrome
Activation is as follows: atrioventricular node, His-Purkinje system, ventricle, accessory connection, atria. The P wave occurs shortly after the QRS complex; it is a short RP interval tachycardia (RP < PR).
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