Estimation of Inter-Electrode Distance for Body Surface Mapping : Application of Fourier Analysis to Potential Distribution due to the Epicardial Breakthrough : The Basic Problems on the Body Surface Potential Mapping
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概要
- 論文の詳細を見る
For the purpose of determining an appropriate distance of lead points for constructing body surface maps, Fourier analysis was performed on potential distribution reflecting the epicardial breakthrough, and inter-electrode distance necessary for sampling of harmonics contributing to the body surface potential distribution was determined by application of sampling theorem. Potential distribution was simultaneously recorded with an interval of 4 mm for 250 msec along the vertical (head to foot) and horizontal (right to left) line crossing a second-minimum appearing on the chest surface of a healthy adult, and the data obtained from 9.6 cm along the respective lines underwent Fourier transform. Relative contribution of the second harmonics to the original wave forms increased with time lapse after QRS initiation, in accordance with reduction of the first harmonics component, and attained the maximum (32.5% of total power spectrum without d-c component) at the instant of occurrence of the second-minimum. A similar tendency was observed among higher harmonics, but their contribution was comparatively low (within 10%). Inter-electrode distance determined by sampling theorem was 4.8 cm for the first harmonics and 2.4 cm for the second harmonics. In conclusion it is proposed that placement of electrodes with an inter-electrode distance of 2.4 cm is necessary for acquiring clinically important data on the epicardial breakthrough.
- 社団法人日本循環器学会の論文
- 1981-11-20
著者
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Toyama Junji
Division Of Circulation And Respiration Research Institute Of Environmental Medicine Nagoya Universi
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Kobori Hiromichi
Division Of Circulation And Respiration Research Institute Of Environmental Medicine Nagoya Universi
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Toyama Junji
Division Of Cardiology Aichi Prefectural Cardiovascular And Respiratory Center
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