The Electrocardiographic Leads for Telemetering as Evaluated from View Point of the Transfer Impedance Vector

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  • NAGATA Yoshihisa
    Division of Circulation and Respiration, Nagoya University Research Institute of Environmental Medicine, Nagoya University

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(1) From the torso model experiments, the measurements of the transfer impedance vectors were carried out for the conventional 12 leads, Frank's lead system and the following 6 different leads commonly used for the ECG-telemetering such as V5R-V1-V9 leads, EEP leads, C5-M lead, L1-ST1 and L1-TH1 lead, when the current dipole was placed in turn at 27 points within the space occupied by the heart in the human torso model filled with electrolyte solution. The transfer impedance vectors for all leads above-mentioned were compared to each other.<br>(2) V5R-V1-V9 leads can be used for the ECG-telemetering, as the equivalent to the precordial leads V1-V9. C5-M, EEP-C5 and V5R-V5 lead could be equivalent to the precordial lead V5, and L1-ST1 and L1-TH1 lead were equivalent to the augmented unipolar limb lead aVF.<br>(3) Taking into account of the experimental result, the number of electrodes applicable and the possibility to eliminate the interference of muscle potential, C5-M, V5R-V5 and L1-TH1 lead can be considered to be the most sensitive leads for detecting coronary artery disease in latent form.

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