Radiofrequency Ablation of Typical Atrial Flutter via Right Jugular Vein due to Bilateral Obstructed Iliac Veins in a Patient with Dilated Cardiomyopathy

Figure 3

3D mapping of the left atrium using NavX system (St. Jude Medical, St. Paul, MN, USA) was shown during atrial flutter. Isochronal activation map constructed during tachycardia using coronary sinus atrial signal as a reference. The color coded display of the activation time in the right atrium measured relative to the reference point with red being early and blue being late. Activation map shows that activation propagates with counterclockwise route. At the bottom of the figure, intracardiac electrogram recording of the clinical tachycardia is seen.