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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are electrical conduction system disorders?
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Heart blocks
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139
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What is the only complete heart block?
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3rd degree
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139
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What is the most common form of block?
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1st degree
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139
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first-degree heart block
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Excessive conduction delay in AV node, resulting in a constant prolong PRI (longer than 0.20 seconds).
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139
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What is the correct way to interpret a first-degree block?
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Include the description of the underlyning rhythm for ex Sinus Brady with first-degree heart block
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139
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What meds are commonly associated with 1st degree blocks?
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Beta-blockers, Calcium channel blocker, and digoxin.
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139
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What are the five steps to interpreting EKG?
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Rate, Rhythm, P wave, PRI, QRS
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140
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Second-degree AV block
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A partial or incomplete heart block characterized by the PRI continues to increase in length until such time as the impulse is not conductive or a QRS complex is "dropped." The ventricular rhythm is irregular, the the atrial rhythm remains regular.
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140
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Second-degree Mobitz type 1 heart block is also referred to as:
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Wenckebach phenomenon or simply Mobitz type I
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140
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Second-degree AV block, Mobitz type II
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The worse of the partial or incomplete blocks, characterized by the constancy of PRI for conductive beats and intermittently absent QRS complex.
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141
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Where is the ventricular conduction coming from in a third-degree heart block with a narrow QRS complex?
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The escape pacemaker located in the junctional tissue
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142
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Where is the ventricular conduction coming from in a third-degree heart block with a widen QRS complex?
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The escape pacemaker located in the Purkinje
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144
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Third-degree heart block
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Complete and lethal dysrhythmia characterized by the P waves not marrying to the QRS complex, thus the P waves are not causing the QRS, the QRS is cause by an escape pacemaker. Thus causing an irregularity due to complete electrical block between the SA and the ventricles.
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144
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Third-degree heart block is sometimes called:
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AV dissociation because the atrial and ventricles operate independently.
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144
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S/S of decrease cardiac output include:
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Syncope, decrease LOC, angina, and other indications of hypoperfusion.
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146
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Typically, first degree block results from excessive conduction delay in the:
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AV node.
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146
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