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17 Cards in this Set
- Front
- Back
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Lead I
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RA - LA
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Lead II
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RA - LL
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Lead III
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LA - LL
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AV blocks: etiologies
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lesions along the conduction pathway, increase in the refractory period of some portion of the conduction pathway, short of the supraventricular cycle length with encroachment on normal refract. period.
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AV blocks: first degree
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delay in passage of the impulse from atria to ventricles
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AV blocks: second degree
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some impulses are conducted while others are blocked
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AV blocks: third degree
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complete ansence of conduction btwn atria and ventricles
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type I-Wenckebach
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type I AV block-prolonged PR interval and a decreasing R-R interval pror to the dropped beat
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type II-Mobitz
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type II AV Block
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ectopic pacemaker
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excitable group of cells that cause a premature heart beat outside normal functioning SA node.
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ectopic pacemaker etiologies
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SNS, ischemia, overstimulation on caffeine, increased parasympathetic nervous system activity
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two problems PVC can cause
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ventricular fibrillation
ventricullar tachycardia |
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defribillation
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an electric shock given to the heart in an event of cardiac arrest
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duration of P
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<0.08 seconds
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duration of PR interval
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0.12-0.20 seconds
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duration of QRS
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<0.12 seconds
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1 square=
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0.04 seconds
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