Senior Project – Electrical Engineering- 2012

Heart Monitor Applicationfor Android

Craig SantangeloAdvisor – Prof. Hedrick

General Block DiagramProject Goal:To reduce the amount of deaths caused by heart

attacks by combining the use of a cell phone with a hospital monitoring system. This system will monitor the heart’s electrocardiogram waveform, detect a heart problem if one arises, and automatically call for help.

Kendall Q-Trace 5400 Resting ECG Electrodes

Analog Circuit

http://www.cvphysiology.com/Arrhythmias/A013a.htm

•Instrumentation Amplifier•Input Driver•Optocoupler•Output Driver•High Pass Filter•Low Pass Filter•Output gain stage

Components

Heart Attack Algorithm1. Establish a baseline (average of all

samples in the PQRST waveform)2. Detect QRS peak3. Make sure the signal returns to the

baseline directly after the peak within approximately 100 ms (width of ST segment)

4. If signal does not return to the baseline within 100 ms of QRS complex, alert the victim and dial 911

SYSTEM

ECG Waveform

http://www.pepidonline.com/emrdemo2003/emr/diagnosis/diagnosis_pic.asphttp://www.vernier.com/experiments/hp-a/12/analyzing_the_heart_with_ekg/

http://storkmedical.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=DL_ECL5400