Defibrillators

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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 theycontribute?
• 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