1. 1 Defibrillators Sponsored by: IEEE Engineering in Medicine and Biology Society (EMBS) Buenaventura Chapter Brought to you by: the IEEE-EMBS Student Chapter of Cal Lutheran University

2. 2 The Heart The heart regulates its beating with electrical pulses The heart regulates its beating with electrical pulses We can see these pulses using an ECG device We can see these pulses using an ECG device

3. 3 Normal Heart Beat

4. 4 Ventricular Fibrillation Ventricular fibrillation is a medical term for chaotic electrical activity within the heart, stopping or slowing blood flow Ventricular fibrillation is a medical term for chaotic electrical activity within the heart, stopping or slowing blood flow

5. 5 What is a Defibrillator? A defibrillator restores normal electrical impulses to the heart during ventricular fibrillation A defibrillator restores normal electrical impulses to the heart during ventricular fibrillation

6. 6 The Power of Defibrillation A corrective shock of 750-800 volts is applied within a tenth of a second A corrective shock of 750-800 volts is applied within a tenth of a second That is the same voltage as 500-533 AA batteries! That is the same voltage as 500-533 AA batteries!

7. 7 Types of Defibrillators InternalExternal

8. 8 Internal Defibrillators A Pacemaker: Steadies the heart beat under normal conditions Steadies the heart beat under normal conditions Triggers shock pulses when irregular heart beats are detected Triggers shock pulses when irregular heart beats are detected

9. 9 External Defibrillators Analyzes the patient and sets appropriate power levels Analyzes the patient and sets appropriate power levels Prevents a shock from being administered to someone who is not in need of one Prevents a shock from being administered to someone who is not in need of one Provides the operator with verbal instructions throughout the defibrillation process Provides the operator with verbal instructions throughout the defibrillation process

10. 10 Who helped develop the defibrillator as we know it today? Who helped develop the defibrillator as we know it today? Where are they from? Where are they from? What did they contribute? What did they contribute? What makes them an engineer? What makes them an engineer? Engineers from Around the World

11. 11 ECG Activity There are many engineers behind the scene who rarely get recognized for what they do. These engineers are cool people too! Time to see what a heartbeat looks like!!!

12. 12 Resources Curriculum Guides and Standards National Science Teachers Association www.nsta.org/standards California State Board of Education, Grade 7 Science Content Standards for 2007: 5b: Structures and Functions in Living Systems 7a: Investigation and Experimentation www.cde.ca.gov/be/st/ss/scgrade7.asp Use of Technology in Education www.emsc.nysed.gov Medical Information Wikipedia: Defibrillators en.wikipedia.org/wiki/Defibrillator Wikipedia: Electrocardiograms en.wikipedia.org/wiki/ECG Electrocardiogram and Heart Disease Overview www.bridgeporthospital.com Sources for Equipment for Teaching About ECGs and Medicine Biopac, Goleta California www.biopac.com Medical Machines Online www.medicalmachinesonline.com Sponsors Buenaventura IEEE EMBS www.bv-embs-chapter.com Cal Lutheran University Bioengineering http://www.callutheran.edu/schools/cas/ overview.php?major_id=57