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Video: Heart beats out of body Intrinsic Conduction System

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Video: Heart beats out of body Intrinsic Conduction System Fig 18.15 Autorhythmic fibers of the intrinsic conducting system Not the same as contractile fibers Are ... – PowerPoint PPT presentation

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Title: Video: Heart beats out of body Intrinsic Conduction System


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Video Heart beats out of body
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Intrinsic Conduction System
Fig 18.15
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  • Autorhythmic fibers of the intrinsic conducting
    system
  • Not the same as contractile fibers
  • Are muscle cells but act like neurons
  • Coordinate the sequence of contraction among the
    contractile fibers
  • Components
  • SA Node (sino-atrial)
  • AV Node (atrioventricular )
  • Bundle of His (AV bundle)
  • LR bundle branches
  • Purkinje fibers
  • Autorhythmicity
  • Why?
  • The sequence

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Autorhythmicity
Fig 18.14
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Pacemakers
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Electrocardiogram
Fig 18.17
Video Conducting System and EKG
Video Sinus rhythms
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ECG Tracings one normal, three dysrhythmias /
arrhythmias
Fig 18.19
Normal sinus rhythm, NSR
Junctional rhythm
2nd degree heart block
Ventricular fibrillation
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Implantable Cardioverter Defibrillators
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Cardiac Output
  • CO HR x SV
  • SV EDV-ESV
  • usually 60-90
  • ejection fraction
  • CO can increase 7X

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QA
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QA
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