Affordable Access

Publisher Website

Electro-Anatomical Characteristics of Typical Atrial Flutter

Elsevier B.V.
DOI: 10.1016/s1880-4276(10)80002-x
  • Atrial Flutter
  • Eustachian Valve/Ridge
  • Crista Terminalis
  • Sinus Venosa
  • Medicine


Type 1 atrial flutter (AFL) is a macroreentrant tachycardia in the right atrium; the anterior barrier of the common AFL circuit is located at the tricuspid annulus (TA) and the posterior border is functional line of block at the posteromedial (sinus venosa region) right atrium. The upper turnover site of the wave front is mainly located at the anterior to the superior vena cava. Conduction property across the posteromedial (sinus venosa region) right atrium in patients with and without AFL is different. i.e., functional conduction block occurs at the lower pacing rate in patients with AFL, and the majority of patients with chronic AFL demonstrate conduction block across the posteromedial (sinus venosa region) right atrium even during sinus rhythm. Catheter ablation therapy for AFL is creation of linear lesion between tricuspid annulus and inferior vena cava. Changes in activation sequence around the tricuspid annulus are used to confirm bidirectional block. However, it is difficult to demonstrate the bidirectional block in the presence of transverse conduction around the inferior vena cava. In such a case, bidirectional block should be confirmed by differential pacing or 3-dimensional mapping system.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Electrophysiologic characteristics of the sinus ve...

on Pacing and clinical electrophy... January 2008

Atrial flutter: typical or atypical?

on Pacing and clinical electrophy... May 2004

[Typical and atypical atrial flutters].

on La Revue du praticien Feb 15, 2004
More articles like this..