| 摘要 |
PURPOSE: To detect the ventricle after potential in each heart-beat by applying the spetrum analyzing method of high resolution to the multi channel observation. CONSTITUTION: The spectrum analyzing method is applied to the identification of the ventricle after potential of the multi-channel MCG (magnetic electrocardiogram) or ECG(electric electrocardiogram) data. For the application, the heart- beat is used as trigger, and the delay time Δt, and the window length L are selected by, for exmaple, a doctor, to trigger the maximum value of the QRS complex wave. The partial data are extracted from the all observed channels M, then approximated in straight in every channels, and the linear part is compensated by subtracting the same from the low data. The modelization of a heart signal at an interval of the extracted data, as the superposing of the attenuated sinusoidal signal, is corresponding to the estimation of a harmonic signal in QRS after-area of heart-beat. That is, the after voltage can be diagnosed by obtaining the specific value by analyzing the block matrix Y, and displaying the specific frequency on histgram. |
