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
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The Heart


The heart regulates its beating with
electrical pulses
We can see these pulses using an
ECG device
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Normal Heart Beat
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Ventricular Fibrillation

Ventricular fibrillation is a medical
term for chaotic electrical activity
within the heart, stopping or slowing
blood flow
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What is a Defibrillator?

A defibrillator
restores normal
electrical impulses
to the heart during
ventricular
fibrillation
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The Power of Defibrillation


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!
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Types of Defibrillators
Internal
External
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Internal Defibrillators
A Pacemaker:
 Steadies the heart
beat under normal
conditions
 Triggers shock
pulses when
irregular heart
beats are detected
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External Defibrillators



Analyzes the patient
and sets appropriate
power levels
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
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Engineers from Around the World




Who helped develop the defibrillator
as we know it today?
Where are they from?
What did they
contribute?
What makes them an
engineer?
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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!!!
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Resources
Curriculum Guides and Standards
National Science Teachers Association
www.nsta.org/standards
California State Board of Education, Grade 7
www.cde.ca.gov/be/st/ss/scgrade7.asp
Science Content Standards for 2007:
5b: Structures and Functions in Living Systems
7a: Investigation and Experimentation
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
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