VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Spatial resolution of body surface potential maps and magnetic field maps : a simulation study applied to the identification of ventricular preexcitation sites
    Hren, Rok ; Stroink, Gerhard ; Horáček, Milan B.
    The spatial resolution of body surface potential maps (BSPMs) and magnetic field maps (MFMs) was investigated by means of an anatomically accurate computer model of the human ventricular myocardium. ... We calculated BSPMs and MFMs for the simulated activation sequences initiated at 35 preexcitation sites located along the atrioventricular (AV) ring of the epicardium. We quantified changes in the BSPMs and MFMs corresponding to different preexcitation sites in terms of the correlation coefficient ▫$(r)$▫. The spatial resolution (selectivity) for a given preexitation site was defined as the half distance between those neighboring locations at which morphological features of maps, in terms of ▫$r$▫, become distinct ▫$(r<0.95)$▫. We found that at 28 ms after the onset of preexcitation and with no noise added, this distance ▫$\pm$▫SD for all sites along the AV ring for the 117-lead BSPMs was ▫$0.83 \pm 0.32$▫ cm, while for the 64-lead and 128-lead MFMs it was ▫$1.54\pm 0.64$▫ cm and ▫$1.15\pm 0.43$▫ cm, respectively. Our findings suggest that when features of nonivasively recorded electocardiographic and magnetocardiographic map patterns are used for identifying accessory pathways in patients suffering from WPW Syndrome, BSPMs are likely to provide more detailed informaton for guiding the ablative treatment than MFMs. For some sites MFMs provide more information. Both modalities may provide additional assistance to the cardiologist in locating the site of the accessory pathway.
    Vir: Medical & biological engineering & computing : journal of the International Federation for Medical & Biological Engineering. - ISSN 0140-0118 (Let. 36, št. 2, 1998, str. 145-157)
    Vrsta gradiva - članek, sestavni del
    Leto - 1998
    Jezik - angleški
    COBISS.SI-ID - 8142937

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