抄録
We carried out a 3D vector measurement of magnetocar-diograms (MCGs) of a subject with myocardial infarction and three normal subjects, using a 3D second-order gradiometer connected to three rf-SQUIDs, which can detect the magnetic field component perpendicular to the chest wall (Bz) and tangential to the chest wall (Bx, By) simultaneously. We introduced principal component analysis in order to compare the frequency characteristic in the MCG waveform of myocardial infarction with that of normal subjects. The results showed that the frequencies in the MCG waveform of myocardial infarction were dominated by lower frequencies (less that 10 Hz) than in normal MCG, and that the score proportion characteristic of Bx was different from that of Bz and By.
