Research Article
New Discovery of Left Atrial Macroreentry Tachycardia: Originating from the Spontaneous Scarring of Left Atrial Anterior Wall
Table 3
Mapping data of atrial tachycardia.
| Patient | Gender | Age | AF history | TCL (ms) | Mapping points per RA map, n | Mapping points per LA map, n | Percentage of low-voltage areas (≤0.45 mV) | At circuit | LAAW activation | MV activation | Avg CV at isthmus (m/s) | Amplitude at isthmus (mV) | Durationat isthmus (ms) | Ablation approach | Tachycardia termination | PVI performed | Follow-up |
| 1 | F | 84 | Yes | 220 | 1547 | 2001 | 36 | Double loop: isthmus between an LAAW scar and the MV | CW | CCW | 0.18 | 0.11 | 87 | Scar to MV | Yes | Yes | Sinus | 2 | F | 86 | No | 210 | 153 (no HD-map) | 2577 | 23.7 | Double loop: isthmus between an LAAW scar and the MV | CW | CCW | 0.20 | 0.24 | 132 | Scar to MV | Yes | No | Sinus | 3 | F | 77 | No | 235 | 1003 | 1888 | 21.6 | Double loop: isthmus between an LAAW scar and the MV | CW | CCW | 0.22 | 0.20 | 159 | Scar to MV | Yes | No | Recurrence | 4 | F | 82 | No | 310 | (Incomplete map) | 1311 | 19 | Double loop: isthmus between an LAAW scar and the MV | CW | CCW | 0.19 | 0.18 | 121 | Scar to MV | Yes | No | Recurrence | 5 | M | 74 | Yes | 290 | 2581 | 2808 | 17.1 | Double loop: isthmus between an LAAW and the base of the LAA | CW | CCW | 0.06 | 0.16 | 127 | Scar to MVand scar to LAA | No to localizedatrial tachycardia | Yes | Sinus | 6 | F | 70 | No | 190 | 1359 | 2116 | 37 | Double loop: isthmus between an LAAW and the MV | CW | CCW | 0.21 | 0.08 | 134 | Scar to MV | Yes | No | Sinus | 7 | F | 77 | No | 225 | 237 (no HD-map) | 660 (no HD-map) | — | Double loop: isthmus between an LAAW and the MV | CW | CCW | — | — | — | Scar to MV | Yes | No | Sinus | 8 | F | 82 | No | 250 | 1610 | 2126 | 31.5 | Single loop: isthmus between an LAAW and the RSPV | Surround the right pulmonary veins | 0.25 | 0.17 | 86 | Scar to RSPV | Yes | No | Sinus | | 9 | F | 86 | No | 245 | — | — | — | Double loop: isthmus between an LAAW and the MV | — | — | — | — | Scar to MV | Yes | No | Sinus | |
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ATatrial tachycardia; AF: atrial fibrillation; CV: conduction velocity; F: female; M: Male; LA: left atria; MV: mitral valve; PVI: pulmonary vein isolation; RA: right atria; CCW: counterclockwise; CW: clockwise; LAAW: left atrial anterior wall; TCL: tachycardia cycle length; HD: High-density; RSPV: right superior pulmonary vein.
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