Progress in Superconductivity
- Volume 7 Issue 1
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- Pages.28-35
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- 2005
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- 1229-4764(pISSN)
Detection of Rapid Atrial Arrhythmias in SQUID Magnetocardiography
스퀴드 심자도 장치를 이용한 심방성 부정맥의 측정
- Kim Kiwoong (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Kwon Hyukchan (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Kim Ki-Dam (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Lee Yong-Ho (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Kim Jin-Mok (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Kim In-Seon (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Lim Hyun-Kyoon (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Park Yong-Ki (Biomagnetism Research Center, Korea Research Institute of Standards and Science) ;
- Kim Doo-Sang (Seoul Veterans Hospital) ;
- Lim Seung-Pyung (Chungnam National University Hospital)
- Published : 2005.10.01
Abstract
We propose a method to measure atrial arrhythmias (AA) such as atrial fibrillation (Afb) and atrial flutter (Afl) with a SQUID magnetocardiograph (MCG) system. To detect AA is one of challenging topics in MCG. As the AA generally have irregular rhythm and atrio-ventricular conduction, the MCG signal cannot be improved by QRS averaging; therefore a SQUID MCG system having a high SNR is required to measure informative atrial excitation with a single scan. In the case of Afb, diminished f waves are much smaller than normal P waves because the sources are usually located on the posterior wall of the heart. In this study, we utilize an MCG system measuring tangential field components, which is known to be more sensitive to a deeper current source. The average noise spectral density of the whole system in a magnetic shielded room was
Keywords
- magnetocardiograph (MCG);
- superconducting quantum interference device (SQUID);
- atrial arrhythmia;
- synthetic aperture magnetometry (SAM);
- reentry tachycardia;
- independent component analysis (ICA)