NSG 506 exam 2 QUESTIONS WITH ANSWERS

NSG 506 exam 2 QUESTIONS WITH
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ANSWERS


biggest concern with arrhythmias? - CORRECT ANSWERS
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✔✔lowering CO |\




atrial kick amount of CO - CORRECT ANSWERS ✔✔20-30%
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atrial kick - CORRECT ANSWERS ✔✔active atrial contraction that
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squeezes more blood into ventricles once valves are open (after
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rapid filling time)
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most atrial dysrhythmias are life threatening? T/F - CORRECT
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ANSWERS ✔✔F |\




PAC's and PJC's are both before what? - CORRECT ANSWERS
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✔✔supraventricular


examples of what can cause the atria to be irritated (leading to
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dysrhythmias) - CORRECT ANSWERS ✔✔HF |\ |\ |\ |\




meds
pulm. HTN |\ |\




atrial hypertrophy
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more stretch on atria
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,what is more lethal: PAC's, PJC's, or PVC's - CORRECT ANSWERS
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✔✔PVC


of QRS is normal what do you know? - CORRECT ANSWERS
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✔✔what's happening is supraventricular (it doesn't affect the
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ventricle)


PAC's - CORRECT ANSWERS ✔✔- early P wave
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- abnormal shaped P wave (positive and upright still though)
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- early P wave may or may not be followed by QRS
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PAC's are very common and not of much concern if they occur
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occasionally in an otherwise normal person T/F - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\


ANSWERS ✔✔T (usually don't require intervention if they're just
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occasional)


PAC's imply underlying cardiac condition always T/F - CORRECT
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ANSWERS ✔✔F (could just be from caffeine, stress, meds,
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tobacco, alc, fatigue, hypokalemia, hypomagnesia, hyperthyroid)
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frequent PAC's may cause: - CORRECT ANSWERS ✔✔A-fib, atrial
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flutter, PSVT (give Ca channel blockers, BB, or antianxiety meds);
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treat underlying cause of PAC's
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atrial tachy - CORRECT ANSWERS ✔✔-overrides SA pacemaker
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(so you get out of sinus rhythm)
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-series of rapid beats from atrial ectopic focus often initiated by
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PAC

, -150-250 bpm |\




-hard to distinguish P from T waves though P waves present and
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before every QRS (P wave may differ in shape from sinus rhythm)
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-regular rhythm |\




-QRS <0.12 |\




-PR interval may be shorter or longer than normal
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atrial flutter - CORRECT ANSWERS ✔✔-irritable site depolarizes
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regularly at an extremely rapid rate (saw tooth pattern)
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-the AV node protects the ventricles from the extremely fast
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atrial rate by blocking some impulses from reaching the
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ventricles (ventricles can beat at regular or irregular rate; rate
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will not go above 180bpm)
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-atrial kick is mostly gone
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-atrial beat 250-350bpm and regular
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-can't see P waves and PR cannot be measured
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-QRS usually <0.12 |\ |\




atrial flutter causes - CORRECT ANSWERS ✔✔-paroxysmal rhythm
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usually initiated by PAC
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-is unusual to see this chronically (usually resolves to sinus or A-
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fib) |\




-rarely occurs in adults w/o cardiac disease; may be seen with
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digoxin toxicity |\ |\




-peds: fetal life or shortly after birth is common, not usually seen
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beyond NB period except with cardiac disease or following
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cardiac surgery |\