Address for Correspondence: Ayan Abdrakhmanov, Department of Interventional Arrhythmology, National Research Cardiac Surgery Center Astana,
Kazakhstan, Email: ayan-3@mail.ru
A 27-year-old patient with episodes of syncope and short episodes of documented tachycardia.
What is the possible cause of syncope?
 1. Scar-related ventricular tachycardia
 2. Atrial flutter with 1:1 conduction
 3. Pre-excited atrial fibrillation
 4. Antidromic AVRT

Figure 1. Electrocardiogram tracings
Ayan Abdrakhmanov, Zhandos Esilbayev
Department of Interventional Arrhythmology
National Research Cardiac Surgery Center
Astana, Kazakhstan
Peer-review: Internal
Authorship: A.A. and Z.E. equally contrıbuted to preparation of quiz
Conflict of interest: None to declare
Acknowledgement and funding: None to declare

