New Discovery of Left Atrial Macroreentry Tachycardia: Originating from the Spontaneous Scarring of Left Atrial Anterior Wall
Table 2
Mapping and ablation characteristics of tachycardia.
Procedure duration (min)
121.2 ± 35.4
Fluoroscopy time (min)
11.2 ± 5.4
Fluoroscopy dose (cGycm2)
131.5 ± 57.6
High-density mapping performed
7
Mapping points per RA map, n
1061.25 ± 891.97
Mapping points per LA map, n
1935.875 ± 682.966
TCL (ms)
241.67 ± 38.00
Double-loop reentry atrial tachycardia
8 (89%)
Critical isthmus (n = 9)
Between the LAAW scar and the anterior mitral annulus
7
Between LAAW scar and the base of the LAA
1
Between LAAW scar and the roof adjacent to the RSPV
1
Isthmus width (mm)
9.59 ± 2.38
Isthmus length (mm)
7.51 ± 2.27
Percentage of (%) LVA (≤0.45 mV)
26.58 ± 8.18
Anatomic relationship with LVA (n = 6)
Ascending aorta
1
Pulmonary artery
3
Ascending aorta and pulmonary artery
2
Overall tachycardia termination
9
To sinus rhythm
8
To secondary atrial tachycardia
1
Values are mean ± SD, n (%), or mean (range). TCL: tachycardia cycle length; RA: right atrium; LA: left atrium; LAAW: left atrial anterior wall; LAA: left atrial appendage; RSPV: right superior pulmonary vein; LVA: low voltage area.
