Abstract
The continuation of human life relies on the heart and it’s reciprocating blood pump utilizing a systolic and diastolic system. To avoid any risks, monitoring and taking care of the heart is essential. In this study, heart rate signal (HRS) is measured using a DFrobot HR Sensor and a AllHeart stethoscope/device to read the systolic and diastolic blood pressure simultaneously. The HRS data was collected using a data acquisition card at a sampling rate of 1.25 Ms/s and processed through a software called LabVIEW. This investigation was conducted on two people (20 year old male vs 60 year old male) to compare HRS in terms of power spectrum and auto-correlation. In the power spectrum, the dominant frequency of the HRS is known at any stage during the measurement in which the dominant peak frequencies are marked at each stage of the signal. We used this to derive the number of heart beats per minute (pulse). The auto-correlation of the elderly person illustrates that HRS is much stronger than in the younger person, causing a difference in the shape of the amplitude between pulses even though the elderly person has abnormal blood pressure. These valuable data sets obtained helps specialists and doctors in diagnosing the heart more accurately. KEYWORDS: Heart Rate Signal; Systolic and Diastolic Blood Pressure; Power Spectrum, Auto-correlation; Dominant Frequency