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The spectral analysis of heart rate variability, based on the Fourier transform, needs even sampled data. The objectives of this study were to develop an interpolation method based on multi rate FIR filters, and then to implement this method for parallel processing machines. A total of three data sets were used: a) simulated heart rate with an IPFM model, b) autonomic blockage database (both pharmacological...
The precise measurement of QT interval and QRS complex duration is important to characterize the electrical cardiac activity of the surface ECG. Variations of these intervals were evaluated when ECG sampling rate changes. The ECG recordings used in this study (n=78) were obtained from a combination of pharmacological blockage and postural changes. The ECG recordings were originally sampled at 500...
The measurement of QT interval on ECG is a marker for malignant ventricular arrhythmias. When QT is measured, it must be corrected to become independent of heart rate (HR) and become a comparable measure of repolarization between different conditions. The objective of this work was to evaluate different types of QT interval correction (Bazzett, Individual and Hodges) for different QT/RR relations...
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