| 摘要 |
Four first electrodes are attached 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, a 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 a standard 12-lead electrocardiogram (ECG). Two second electrodes are attached on such positions of the living body that correspond to a lead V 2 and a lead V 4 of chest leads of the standard 12-lead ECG. A first ECG data set corresponding to leads I and II of the standard 12-lead EGG with the first electrodes. A second ECG data set including the leads V 2 and V 4 with the second electrodes. An instantaneous electromotive force vector (a heart vector) is calculated based on the first and second ECG data sets, and predetermined first lead vectors of the leads I, II, V 2 and V 4 . A third ECG data set including leads V 1 , V 3 , V 5 and V 6 of the chest leads is calculated based on the heart vector-and predetermined second lead vectors of the leads V 1 , V 3 , V 5 and V 6 . A fourth EGG data set corresponding to leads III, aVR, aVL and aVF of the standard 12-lead EGG based on the first ECG data set The standard 12-lead EGG is derived based on the first to fourth ECG data sets.
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