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International Journal of Arrhythmia 2017;0(0):
Interrelated atrioventricular reentrant tachycardia and idiopathic left ventricular tachycardia in a patient with manifested bystander accessory pathway
Da Hyon Lee 1, Seung Jung Park 1, Young Keun On 1, June Soo Kim 1, Kyoung Min Park 1
Division of Cardiology, Department of Internal Medicine, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
Corresponding Author: Kyoung Min Park ,Tel: 82-2-3410-3419, Fax: 82-2-3410-3419, Email: kyoungmin.park@samsung.com
Received: February 16, 2017.  Accepted: May 21, 2017.
Double tachycardia is defined as the coexistence of supraventricular tachycardia (SVT) and ventricular tachycardia (VT). In clinical practice, incidentally encountered double tachycardia is hard to diagnose during electrophysiology study without prior documentation of both tachycardia. SVT can be confused with VT because SVT sometimes show an aberrant conduction depending on heart rate. In the present case, a patient with Wolff–Parkinson–White syndrome (WPW) syndrome exhibited atrioventricular reentrant tachycardia (AVRT) via concealed bypass tract and idiopathic left ventricular tachycardia (ILVT), which were difficult to discriminate due to similar cycle length and interrelationship.
Key Words: atrioventricular reentrant tachycardia; idiopathic left ventricular tachycardia; double tachycardia