Modulation of the slow pathway in the presence of a persistent left superior caval vein using the novel magnetic navigation system Niobe.
OBJECTIVE
This is the first report of a young female with typical AVNRT in the presence of a persistent left superior caval vein that underwent catheter ablation using the novel magnetic navigation system (MNS) Niobe (Stereotaxis Inc.).


METHODS
The MNS consists of two outer permanent magnets (about 0.1 T) that align a third small magnet integrated in the tip of a mapping and ablation catheter along its magnetic field lines. By changing the orientation of the outer magnets, the orientation of the magnetic field lines also change, thereby allowing navigation of the ablation catheter. In combination with an automated advancer system, this novel technique allows for the first time complete remote catheter ablation.


RESULTS
Successful slow pathway modulation was performed using a total of seven radiofrequency current applications via the magnetic ablation catheter. No complication occurred.


CONCLUSIONS
The novel magnetic navigation system proved to be a safe and feasible tool for remote catheter ablation of common type AVNRT in the presence of a persistent left superior caval vein.
Ernst
Sabine
S
II. Med. Abteilung (Kardiologie), Allgemeines Krankenhaus St. Georg, Lohmühlenstr. 5, 20099 Hamburg, Germany.
Ouyang
Feifan
F
Linder
Christian
C
Hertting
Klaus
K
Stahl
Fabian
F
Chun
Julian
J
Hachiya
Hitoshi
H
Krumsdorf
Ulrike
U
Antz
Matthias
M
Kuck
Karl-Heinz
KH
D000328:Adult; D017115:Catheter Ablation / Q000295:instrumentation* / Q000379:methods; D004574:Electromagnetic Fields; D022062:Electrophysiologic Techniques, Cardiac / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D012008:Recurrence; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D014683:Vena Cava, Superior / Q000002:abnormalities*