QUIZ

Answer to a Quiz on page 23: Electrophysiology

Article Summary

• DOI: 10.24969/hvt.2019.102
• Page(s): 36
• Electrophysiology

• Published: 29/01/2019
• Received: 24/01/2019
• Accepted: 25/01/2019

• Views: 5130
• Downloads: 5493

• Keywords: quiz, electrocardiogram

Answer to a Quiz  on page 23: Electrophysiology

Correct answer 3: pre-excited atrial fibrillation

Comment:

In patients with an accessory pathway a short antegrade refractory period can result in atrial fibrillation with rapid, irregular, ventricular activation via the accessory pathway that can result in hemodynamic compromise and can trigger ventricular fibrillation. Scar-related ventricular tachycardia involves a reentrant circuit and usually presents as a regular wide complex tachycardia. Typical atrial flutter with 1:1 conduction over the accessory pathway would also present as a regular wide complex tachycardia, with an expected rate around 300/min. Antidromic AVRT would also present as a wide complex regular tachycardia as the antegrade part of the circuit is over the accessory pathway, retrograde conduction over the atrioventricular  node.

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