CM Final 1

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Author:
Anonymous
ID:
211953
Filename:
CM Final 1
Updated:
2013-04-07 11:30:32
Tags:
aa emory clinical methods
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Description:
CM final conduction blocks
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  1. Define conduction block:
    any obstruction or delay of the normal pathways of electrical conduction in the heart
  2. What are the 3 main types of conduction blocks?
    • Sinus Node Block
    • AV Block
    • Bundle Branch Block
  3. Describe a Sinus Node Block
    Sinus node fires NORMALLY.  Wave of Depolarization is blocked and NOT transmitted to atrial tissue.
  4. Describe AV Block
    Any conduction block btw the sinus node and Purkinje Fibers (including AV node and bundle of His).
  5. Describe Bundle Branch Block:
    • Conduction block in one or both of the ventricular bundle branches
    • Can be FASICULAR BLOCK where only a part of one of the bundle branches is blocked.
  6. AV block has ___ varieties, which include; ___, ____, _____ Degree blocks.
    • 3
    • first
    • second
    • third
  7. FIRST Degree AV block: 
    Rhythm: ________. 
    Rate: _____________. 
    PRI is _____ than ____ sec. 
    QRS: ______________.
    • Regular
    • that of underlying rhythm
    • GREATER 0.2
    • usually normal

  8. What type of block is shown?
    First Degree AV block
  9. Second Degree Block is also known as _______ __.
    Mobitz I
  10. SECOND DEGREE BLOCK:
    Rhythym: irregular (vent), atrial is reg
    PRI:
    QRS:
    P waves:
    • irregular (vent), atrial is reg
    • successively longer until one QRS fails
    • Normal
    • Look similar


  11. What type of block is shown above?
    Second degree block - MOBITZ I
  12. SECOND DEGREE BLOCK - Mobtiz II
    Ventricular rhythm: 
    Atrial rhythm:
    PRI:
    QRS:
    P waves:
    • irregular
    • regular
    • normal to Prolonged
    • abnormal
    • punctual and similar
  13. What is the main characteristic of a Mobitz II block?
    QRS suddenly dropped


  14. What type of block is shown above?
    Second Degree AV block- Mobitz II
  15. Third Degree AV Block:
    • No association between atria and ventricles.
    • Atria and ventricles are depolarizing independently.

  16. What type of block is shown above?
    THIRD Degree AV Block
  17. Right Bundle Branch Block:
    Check ____ first.
    V1, V2: ____ wave
    V5, V6, Lead I: _____ __ wave
    • QRS
    • R, R1 Wave
    • Slurred S
  18. Left Bundle Branch block:
    Check ____ first.
    QRS: ______ and _______
    T wave: may be ________
    V1-V3:
    • QRS
    • blunted and positive
    • inverted
    • Predominantly negative
  19. Define Hemiblock:
    conduction block of JUST ONE of the fascicles of the left bundle branch.
  20. What is the major effect of HEMIBLOCKS?
    EKG axis deviation
  21. LEFT Anterior Hemiblock:
    QRS:
    ST segment and T wave:
    Axis deviation:
    Other cause present?
    • normal
    • no change
    • LEFT
    • No
  22. Left POSTERIOR Hemiblock:
    QRS:
    ST segment and T wave:
    Axis deviation:
    Other causes present?
    • QRS:
    • ST segment and T wave:
    • Right
    • NO

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