Atrial flutter: Right, left, or both?

摘要

EnSite Velocity Cardiac Mapping System (St. Jude Medical, St. Paul, MN, USA). The three-dimensional color-coded time activation map showed a macroreentrant circuit involving both atria (Figure 2, white arrows). The circuit, starting around the superior vena cava, reached the left atrium through the Bachmann bundle, descended around the right pulmonary veins down to the coronary sinus, and ended with clockwise activation of the right atrium with a slow conduction isthmus in the mid part of the right lateral wall. A radiofrequency ablation line applied to the high anteroseptal area of the right atrium terminated the flutter, and the arrhythmia was not rein-ducible.