[Application of spectral frequency analysis in atrial fibrillation mechanism assessment].
Recent studies have demonstrated spatio-temporal organisation in atrial fibrillation (AF), with a highest dominant frequencies (DF) at pulmonary veins ostia (PVo). We present a case of 58-year-old woman with AF evaluated by spectral frequency analysis. Simultaneous recordings at each veno-atrial junction and coronary sinus were obtained. Sequential fast Fourier transforms (FFT) of digitalized signals were performed. FFT profiles were analysed to determine DF. Low DF recorded at right inferior PVo suggested no contribution to AF process. Ablation of high DF PVo and low DF SVC with nonuniform anisotropic conduction resulted in AF termination and good clinical outcome in 1-year follow-up.
Urbanek
Piotr
P
Instytut Kardiologii, ul. Alpejska 42, 04-628 Warszawa. urbil@wp.pl
Kuklik
Paweł
P
Szumowski
Lukasz
L
Derejko
Paweł
P
Kepski
Roman
R
Bodalski
Robert
R
Szufladowicz
Ewa
E
Przybylski
Andrzej
A
Orczykowski
Michał
M
Zakrzewska
Joanna
J
Zebrowski
Jan
J
Walczak
Franciszek
F
D001281:Atrial Fibrillation / Q000145:classification / Q000175:diagnosis* / Q000628:therapy; D017115:Catheter Ablation / Q000379:methods; D004562:Electrocardiography / Q000379:methods*; D022062:Electrophysiologic Techniques, Cardiac / Q000379:methods; D005260:Female; D006801:Humans; D008875:Middle Aged; D011667:Pulmonary Veins / Q000503:physiopathology; D012815:Signal Processing, Computer-Assisted; D017550:Spectroscopy, Fourier Transform Infrared