Localized rotors and focal impulse sources within the left atrium in human atrial fibrillation: A phase analysis of contact basket catheter electrograms.
BACKGROUND
Consistent detection of rotor(s) and/or focal impulse(s) of atrial fibrillation can using a 64-pole basket catheter remain unclear.


RESULTS
Intracardiac left atrial electrograms were recorded, prior to ablation, in 20 patients with atrial fibrillation. Unipolar electrograms, filtered at 0.1-300 Hz, were recorded and exported for an offline phase analysis. From the cohort, 8 of the 20 patients had analyzable data. Localized rotors were identified in 3 of these patients, with focal impulses detected in 4 patients.


CONCLUSIONS
Localized rotors and focal impulses can be identified on phase maps of atrial fibrillation in a small number of patients.
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Naoko
N
Sasaki
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Yasuo
Y
Okumura
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Ichiro
I
Watanabe
Cuoretech Pty. Ltd., Sydney, Australia.
Andrew
A
Madry
Cuoretech Pty. Ltd., Sydney, Australia.
Yuki
Y
Hamano
Nihon Kohden Corporation, Tokyo, Japan.
Mizuki
M
Nikaido
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Rikitake
R
Kogawa
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Koichi
K
Nagashima
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Keiko
K
Takahashi
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Kazuki
K
Iso
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Kimie
K
Ohkubo
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Toshiko
T
Nakai
Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
Atsushi
A
Hirayama
Atrial fibrillation; Focal impulse; Phase mapping; Rotor