title: Noninvasive recording of his potential using magnetocardiograms.
abstract: The present study investigated whether magnetocardiograms (MCGs) could noninvasively detect the His potential. In 22 patients, the His - ventricular (HV) intervals in MCGs (64-channel system, 2-min signal averaging, filter: 0.1-100 Hz, and band-eliminating filter of 50 Hz) were compared with those recorded in an electrophysiologic study (EPS, filter: 30-400 Hz). In 14 of the patients (64 %), the His potential was recorded in the MCGs. There was a correlation between the HV intervals in the MCGs and those in the EPS (R = 0.81, p<0.01). This study indicates that MCGs can be used to investigate the specialized conduction systems for which EPS is currently used.
authors.affiliation: Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan. satsuyamada-circ@umin.ac.jp
authors.forename: Satsuki
authors.initials: S
authors.lastname: Yamada
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kuga
authors.forename: Kei
authors.initials: K
authors.lastname: On
authors.forename: Iwao
authors.initials: I
authors.lastname: Yamaguchi
mesh_terms: D018780:Body Surface Potential Mapping / Q000379:methods*; D002036:Bundle of His / Q000503:physiopathology*; D004562:Electrocardiography; D004594:Electrophysiology; D006327:Heart Block / Q000175:diagnosis* / Q000503:physiopathology*; D006801:Humans; D008280:Magnetics