Walking Stick with Heart Attack Detection

The ECG circuitry unit on the wrist captures abnormal heart beat signal from the patient. The micro controller on the stick runs a heart attack algorithm. Warning is given out to the person about his heart condition to our family, Ambulance and Doctor. The Bluetooth emergency calling system calls for medical help at the moment of heart attack. This project aims to shorten the time between the moment of heart attack and the arrival of medical personal. The warning before the emergency call will give the patient a chance to avoid heart attack.

The national heart institute states that “more than 3 million persons in each country have a heart attack and about half of them die in each year.”  About one-half of those who die do so within 1 hour of start of symptoms and before reaching the hospital. This heart attack detection algorithm consists of 3 basic sub projects namely ECG circuit, analysis algorithm and Wi-Fi communication.

The frequency range of ECG signal depends on the activity of individual.  The typical range is approximately from 50Hz to 72Hz.  To cover a wide range of frequencies for all scenarios, the band-pass filter of the ECG circuity is designed to have a lower cutoff frequency of 0.5Hz and an upper cutoff frequency of 150Hz.  The analog output of the ECG circuit must be in the range between -2V to +2V so that the A/D conversion operates properly.  The overall amplification inside the ECG circuitry should be at least 3000 but no greater than 5000.  The minimum sampling rate of A/D converter should be 400Hz to capture the detailed ECG waveform that changes in millisecond unit.

The transmitted data and the received data must be the same.  No noise should be added during the transmission. The distance for reliable transmission should be wide enough so that the movement of user is not limited in the near area of the stick.  40 feet is chosen as the user is assumed to be within this distance during all his activities.

All the hardware should operate with low power consumption, and the micro controller must show the least number of error when it runs the heart attack algorithm.  High risk and low risk warnings should be shown when symptoms are detected.  The delay time between the moment of heart attack detection and shown when symptoms are detected.  The delay time between the moment of heart attack detection and the activation of Bluetooth module should be as short as possible.

Walking stick use to detect Heart attack with inform patient signal to our home, Ambulance and our doctor also. So previously detect our heart attack using this equipment.