RESUMO
There is often a need to access heart rate measuring system which provides accurate and quick readings of patients. This paper presents the design of simple heart rate measurement system based on Arduino board which displays and simultaneously transmitting the data to a smartphone via Bluetooth. Here the cardiac activity of the patient is acquired by a pulse sensor and the output of this sensor is transmitted using Bluetooth. By using this system unlike the conventional method, the doctor doesn't need to be present at the time of measuring the heart rate. The system takes the physical input from pulse sensor by placing the patients’ finger on the sensor and then the input is processed by Arduino to count the number of pulses and displaying the output in the smartphone using a Bluetooth application.