Errors due to sampling frequency of the electrocardiogram in spectral analysis of heart rate signals with low variability

Author

Abboud, S. ; Barnea, O.

Author_Institution

Dept. of Biomed. Eng., Tel Aviv Univ., Israel

fYear

1995

fDate

10-13 Sept. 1995

Firstpage

461

Lastpage

463

Abstract

Spectral analysis of the heart rate signal was studied in patients with low heart rate variability regarding an error that may occur when there is a specific relation between the averaged heart rate and the sampling frequency of the electrocardiogram. ECG waveforms were recorded from healthy subjects and from patients after heart transplant, digitized with different sampling rates and analyzed for spectral analysis of heart rate variability. It was found that in healthy subjects with high heart rate variability, accurate results can be obtained when the sampling rate of the ECG is greater than 125 Hz. In heart transplant patients, up to 100% error may occur when the sampling rate is below 1 kHz. It is concluded that for spectral analysis of the heart rate signal recorded from patients that are characterized with low heart rate variability, high sampling rate of the ECG signal is necessary (1 kHz).

Keywords

electrocardiography; medical signal processing; spectral analysis; 1 kHz; 125 Hz; digitized signals; electrocardiogram spectral analysis errors; healthy subjects; heart rate signals; heart transplant patients; low variability signals; sampling frequency; sampling rate; Analytical models; Electrocardiography; Fluctuations; Frequency; Heart rate; Heart rate variability; Sampling methods; Signal analysis; Signal processing; Spectral analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1995

Conference_Location

Vienna, Austria

Print_ISBN

0-7803-3053-6

Type

conf

DOI

10.1109/CIC.1995.482685

Filename

482685