A Case of Atrial Tachycardia Circulating around a Left Atrial Roof Scar with Diabetes Mellitus and Renal Failure on Hemodialysis

Figure 4

(a) The propagation map of AT with the LA, right atrium (RA), and CS. Arabic numbers indicate the time course of AT. The wavefront conducts around the LA scar with no excitation of the RA (images 1–3). The mid to inferior part of the RA began to activate (image 4). The RA wavefront went up to the RA septum and turned around the TA in a counterclockwise manner (images 5 and 6). The orange arrowhead indicates the AT wavefront. (b) The anatomical relationship between the LA low-voltage area and the ascending aorta, as well as between the LA scar and the pulmonary artery presented with the 3D electroanatomical map of the LA merged with computed tomography. As indicated by the red line, the LA scar was represented by grey area and the low-voltage areas were represented by red, yellow, and green areas.

(a)

(b)