| US 7,613,506 B2 | ||
| Method for deriving standard 12-lead electrocardiogram, and monitoring apparatus using the same | ||
| Daming Wei, The University of Aizu Faculty House A307, 17-26, Matsunaga 1-chome, Ikki-machi, Aizuwakamatsu-shi, Fukushima (Japan); and Yoshio Sakai, Tokyo (Japan) | ||
| Assigned to Nihon Kohden Corporation, Tokyo (Japan); and Daming Wei, Fukushima (Japan) | ||
| Filed on Aug. 29, 2005, as Appl. No. 11/212,565. | ||
| Claims priority of application No. P2004-248016 (JP), filed on Aug. 27, 2004. | ||
| Prior Publication US 2006/0047212 A1, Mar. 02, 2006 | ||
| Int. Cl. A61B 5/04 (2006.01) | ||
| U.S. Cl. 600—509 [600/512] | 4 Claims |
| 1. A method of deriving a standard 12-lead electrocardiogram, comprising:
attaching four first electrodes on the vicinity of a lower right end of a right clavicle, the vicinity of a lower left end
of a left clavicle, the vicinity of a position on a right anterior axillary line at the level of a right lowermost rib, and
the vicinity of a position on a left anterior axillary line at the level of a left lowermost rib of a living body, so as to
correspond to limb leads of the standard 12-lead electrocardiogram;
attaching two second electrodes on such positions of the living body that correspond to a lead V2 and a lead V4 of chest leads of the standard 12-lead electrocardiogram;
measuring a first electrocardiogram data set corresponding to a lead I and a lead II of the standard 12-lead electrocardiogram
with the first electrodes;
measuring a second electrocardiogram data set including the lead V2 and the lead V4 with the second electrodes;
calculating an instantaneous electromotive force vector (a heart vector) based on the first electrocardiogram data set, the
second electrocardiogram data set, and predetermined first lead vectors of the lead I, the lead II, the lead V2 and the lead V4;
calculating a third electrocardiogram data set including a lead V1, a lead V3, a lead V5 and a lead V6 of the chest leads based on the heart vector and predetermined second lead vectors of the lead V1, the lead V3, the lead V5 and the lead V6;
calculating a fourth electrocardiogram data set corresponding to a lead III, a lead aVR, a lead aVL and a lead aVF of the
standard 12-lead electrocardiogram based on the first electrocardiogram data set; and
deriving the standard 12-lead electrocardiogram based on the first electrocardiogram data set, the second electrocardiogram
data set, the third electrocardiogram data set and the fourth electrocardiogram data set.
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