The most common form of PSVT?: (A) Tachycardia originating from the atrium, (B) AV nodal reentry tachycardia, (C) WPW syndrome, (D) Focal atrial tachycardia
Answer is B. Pathologic supraventricular tachycardia A. Tachycardia originating from the atriumDefining feature: tachycardia may continue despite beats that fail to conduct to the ventricles, indicating that the AV node is not paicipating in the tachycardia circuitB. AV nodal reentry tachycardiaDefining feature: paroxysmal regular tachycardia with P waves visible at the end of the QRS complex or not visible at allThe most common paroxysmal sustained tachycardia in healthy young adults; more common in womenC. Tachycardias associated with accessory atrioventricular pathwaysDefining feature: paroxysmal sustained tachycardia similar to AV nodal reentry; during sinus rhythm, evidence of ventricular preexcitation may be present (Wolff-Parkinson-White syndrome) or absent (concealed accessory pathway)Harrison 19e pg: 1476