BACKGROUND: QT dispersion reveals heterogeneities in the repolarization time in the three-dimensional (3D) structure of the ventricular myocardium. In this study, we report on a 3D function map of @entity1054 (RT) dispersions as measured by 64-channel magnetocardiography (MCG). METHODS: MCG were simultaneously recorded in 29 controls and 21 @entity1 with previous @entity583 ( @entity583 ). The 3D current density was calculated from 64-channel MCG data in the Bz component using a space filter. The heart outline, reconstructed from the integrated the current density, revealed both the atrium and ventricle. The RT for the intervals between QRS onset and the time of the maximum dT/dt of T wave, and the peak to the end of the T wave (T(peak)-negative dT/dt) were automatically measured by means of a computer from 3D MCG data. The corrected RT (RTc) and corrected T(peak)-negative dT/dt were then calculated using Bazett's formula. The 3D RTc and the corrected T(peak)-negative dT/dt dispersion map were superimposed on the heart outline generated by MCG. RESULTS: The RTc was significantly longer for the @entity583 group than in the control group (67+/-25 ms1/2 vs. 16+/-6 ms1/2) (p<0.0001). The corrected T(peak)-negative dT/dt dispersions in each @entity1 was also significantly longer for the @entity583 group than in the control group (35+/-27 ms1/2 vs. 10+/-5 ms1/2) (p<0.0001). Furthermore, the 3D RTc and T(peak)-negative dT/dt dispersion maps corresponded with the space location of @entity583 , as defined by Tc-99m tetrofosmin myocardial imaging CONCLUSIONS: 3D RTc and T(peak)-negative dT/dt dispersion maps in the ST segment, obtained by 64-channel MCG may be used demonstrate the location of a @entity296 and heterogeneities of repolarization.

Three-dimensional XXXX dispersion map by 64-channel magnetocardiography may demonstrate the location of a @entity296 and heterogeneity of repolarization.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity583 :: ('MESH:D009203', 'Disease') :: ['myocardial infarction', 'MI'] @entity296 :: ('MESH:D009202', 'Disease') :: ['myocardial injury'] @entity1054 :: ('MESH:D000377', 'Disease') :: ['recovery time']
@entity1054 :: (MESH:D000377,Disease) :: ['recovery time']
