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Detection of atrial arrhythmia in superconducting quantum interference device magnetocardiography; preliminary result of a totally-noninvasive localization method for atrial current mapping

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Authors
Kim, Doosang; Kim, Kiwoong; Lee, Yong-Ho; Ahn, Hyuk
Issue Date
2007-08-03
Publisher
European Association for Cardio-thoracic Surgery
Citation
Interact Cardiovasc Thorac Surg. 2007 Jun;6(3):274-9. Epub 2007 Feb 14.
Keywords
AgedAtrial Fibrillation/*diagnosisBody Surface Potential MappingHumansMagnetocardiography/*methodsMaleSignal Processing, Computer-AssistedSoftware
Abstract
Map-guided surgery is the goal for treatment of atrial fibrillation (AF), because it minimizes unnecessary incisions or procedures. We propose a totally-noninvasive and even non-contact method to detect atrial arrhythmia with a superconducting quantum interference device magnetocardiography (MCG) system, and report the first clinical application case of MCG map-guided AF surgery. To detect weak atrial excitation, we utilized a high sensitive 64-channel MCG system measuring tangential magnetic field components, which is known to be more sensitive to a deeper current source. We measured the MCG signals from eight patients with chronic AF. Then, we separated the f-wave from the other components by using independent component analysis. The extracted f-wave caused by reentrant myocardial excitation was three-dimensionally localized on the mesh model of a human heart by a novel beamformer technique having a surface action potential activity as its filter output. We localized the abnormal stimulation source of an atrial arrhythmia non-invasively and visualized the current source distribution corresponding to the atrial excitation successfully on the three-dimensional atrial surface, which was separated from the ventricular excitation. Using this atrial mapping, we underwent minimal AF surgery in three patients and converted their AF to sinus rhythm successfully.
ISSN
1569-9285 (Electronic)
Language
English
URI
http://icvts.ctsnetjournals.org/cgi/content/full/6/3/274

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17669841

http://hdl.handle.net/10371/15791
DOI
https://doi.org/10.1510/icvts.2006.142869
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College of Medicine/School of Medicine (의과대학/대학원)Thoracic Surgery (흉부외과학전공)Journal Papers (저널논문_흉부외과학전공)
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