Correlation analysis of dynamic spectral phonocardiogram withelectrocardiogram as a means of assessing the heart ailment

摘要

This paper reports the development of a PC-based system performingspectral estimation and correlation analysis of phonocardiogram andelectrocardiogram as to establish a basis for making cardiovasculardiagnosis. Keeping in view of simplicity in hardware requirement, a PCis converted into a real-time PC by adding an I/O card to the printerport. The heart sound signal picked up from a high sensitive microphoneand the ECG signal taken from the electrodes attached to the patient aredigitized, read in to the PC and saved as data files. From these datafiles, power spectral densities are estimated accordingly. Then, the PSDof the patient's heart sound is cross correlated with the PSD of thestored normal heart sound and also with the PSD of the ECG. The powerspectral densities and the cross correlation results are presentedsimultaneously as 3-D window display in the PC screen. The simultaneousdisplay of all these information would help in simplifying the diagnosisprocess