ABSTRACT
In this paper, a standard ECG database (European ST-T Database) is used to analyzed the frequency spectrum of electrocardiogram waveform based on the Welch＇s method of averaging modified periodograms, belonging to the nonparametric model power sepctrum estimation. The final computing results give a general description of the spectral range and the maximal energy segment of ECG waveform, which is helpful to design the hardware circuits of ECG signal extraction and the software algorithm of the waveform recognition such as P wave, QRS wave and T wave.
ABSTRACT
This paper introduces an impedance pneumograph monitor based on the single chip computer 80C552. It shares the same pair electrodes with ECG, and not only be applied to a multi-parameter physiological monitor as a subfunction model, but also can be operated as an independent instrument. This impedance pneumograph monitor can retrain the external interference such as ECG and myoelectricity with high efficiency, and has the advantages of smooth tespiratory waveform, good stability and high clinical application value.