MAGNETOCARDIOGRAPHY AND 32-LEAD POTENTIAL MAPPING : REPOLARIZATION IN NORMAL SUBJECTS DURING PHARMACOLOGICALLY INDUCED STRESS

摘要: Repolarization of the Magnetocardiogram. Signals from 37 magnetocardiographic sensors and simultaneously recorded 32 ECG leads were obtained in three healthy male subjects (including two reinvestigations). After recordings at rest, heart rate was increased by pharmacologic stress (117 to 142 beats/min). Comparison repolarization rest showed substantial changes magnetocardiogram (MCG) up T wave inversions during stress. In only junctional ST-T segment shifts present. Eor quantification, correlation coefficients between pairs MCG distributions calculated for same time instant beginning under conditions. addition, equivalent electrical current dipole moment magnetic vectors MCG, their cbange evaluated. Correlation comparison ranged 0.3 0.5; suggested much less change stress, ranging 0.7 1.0. Current onset marginal; contrast, changed substantially. Since refiects vortex currents, its intensity and/or orientation suggest this as biophysical basis striking difference response Normal findings support conclusion that nonpathologic origin.