This invention relates to the field of electrocardiogram (ECG)
signal processing technology, and particularly to a method and
system for indirectly acquiring ECG vectorgraphs using a conventional electrocardiograph. This method utilizes the chest lead electrodes C1, C2, C3, C4, C5, and C6 of a conventional electrocardiograph to acquire unipolar lead ECGs corresponding to the I, E, C, A, M, and H detection points in the Frank
lead system, denoted as V... I V E V C V A V M V H Based on the pressurized unipolar limb lead aVF
signal output by a conventional electrocardiograph and the V
signal of the left
lower limb unipolar lead electrocardiogram... F The relational expression is used to calculate V. F
Signal; based on the V I V E V C V A V M V H and V F The signal is used to calculate the x, y, and z signals of a bipolar orthogonal lead electrocardiogram using a preset linear combination formula; the calculated x, y, and z signals are then used to synthesize a two-dimensional or three-dimensional electrocardiogram
vector map. This invention enables conventional
electrocardiographs to simultaneously generate electrocardiogram vector maps without increasing hardware costs, achieving dual diagnosis with a single examination.