In order to provide accurate heart rate variability indices of sympathetic and parasympathetic activity, the low frequency and high frequency components of an RR heart rate signal must be adequately separated. This is not always possible by just applying spectral analysis, as power from the high and low frequency components often leak into their adjacent bands. Furthermore, without the respirat...

Despite the population of the noninvasive, economic, comfortable, and easy-to-install photoplethysmography (PPG) sensor, a mathematically rigorous and stable algorithm to simultaneously extract the fundamental physiological information, including the instantaneous heart rate (IHR) and the instantaneous respiratory rate (IRR), from the single-channel PPG signal is lacking. A novel signal process...

A low cost and portable method for measuring heart rate is described. A heart rate measurement simply takes a raw ECG signal and processes it to obtain sample of heart beats and computes the beats per minute so that the information can easily be used to track heart condition. First a raw ECG signal is taken and then filtered to remove unwanted signals which are then passed through moving window...

The periodic and random variations in human heart rate are physiologically and clinically significant. A wide variety of signal processing techniques have been applied to heart rate time series to extract information regarding heart rate variability. The heart rate response to a startling auditory stimulus is a useful measure of an individual's cardiovascular reactivity and may be related to th...