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

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.