Table 3.

Regional CFAE and electrogram characteristics in human AF

Region	AFCL (ms)	Fractionation grade (0–1)	Prevalence of CFAE types	Bipolar amplitude (mV)	MAP amplitude (mV)
LA appendage	176 ± 38	0.1 ± 0.3	III: 29%, V: 71%	0.6 ± 0.4	1.2 ± 0.7
Pulmonary veins	179 ± 27	0.4 ± 0.4	I: 15%, II: 7%, III: 37%, IV: 19%, V: 22%	0.3 ± 0.3	0.7 ± 0.3
Mitral isthmus	189 ± 35	0.3 ± 0.6	III: 25%, IV: 25%, V: 50%	0.5 ± 0.5	0.9 ± 0.7
LA posterior	187 ± 39	0.5 ± 0.3	I: 15%, II: 5%, III: 60%, IV: 15%, V: 5%	0.3 ± 0.2	0.8 ± 0.4
LA roof	178 ± 35	0.2 ± 0.2	III: 30%, IV: 30%, V: 40%	0.4 ± 0.2	1.2 ± 0.8
Coronary sinus	185 ± 31	0.4 ± 0.3	III: 90%, V: 10%	0.5 ± 0.3	1.0 ± 0.4
LA septum	187 ± 47	0.6 ± 0.2	II: 11%, III: 67%, IV: 11%, V: 11%	0.3 ± 0.2	1.1 ± 0.7
RA septum	180 ± 28	0.5 ± 0.3	II: 22%, III: 56%, IV: 11%, V: 11%	0.5 ± 0.2	1.2 ± 0.5
RA appendage	184 ± 40	0.3 ± 0.4	II: 8%, III: 42%, IV: 8%, V: 42%	0.6 ± 0.6	2.0 ± 0.9
RA high	191 ± 42	0.3 ± 0.3	III: 67%, V: 33%	0.6 ± 0.3	1.5 ± 0.9
RA isthmus	175 ± 29	0.4 ± 0.2	III: 67%, V: 33%	0.4 ± 0.3	1.0 ± 0.5

AF = atrial fibrillation; AFCL = atrial fibrillation cycle length; CFAE = complex fractionated; LA = left atrium; MAP = monophasic action potential; RA = right atrium.