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NURS 480 Exam 1 Questions And Accurate Answers
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NURS 480 Exam 1 Questions And Accurate AnswersReading an ECG Strip - ANSWER - Every small box is 0.04 seconds
- Each large box is 0.20 seconds
30 large boxes = 6 seconds
Premature Atrial Contraction - ANSWER - early electrical impulse caused by neural
tissue in the atria
- Causes : stimulants, strong emotion, smoking tobacco, caffeine
- Intervention: check electrolytes, lifestyle changes
Sinus Bradycardia - ANSWER - HR < 60 bpm
- Rhythm: regular
- Risk Factors: hypoxia, medications (beta-blockers), lyme disease, hypothyroid,
hypothermia
- Symptoms: asymptomatic, syncope, low BP, SOB, dizziness, confusion
- Treatment: Atropine
Sinus Tachycardia - ANSWER - HR >100 bpm
- Rhythm: regular
- Risk Factors: anemia, hypoxia, hyperthyroid, drugs
- Symptoms: asymptomatic, SOB, chest pain
- Treatment: beta-blockers (anything ending in -lol), calcium channel blockers
(diltiazem, nifedepine), change in lifestyle
Estimating HR on ECG - ANSWER ***RHYTHM MUST BE REGULAR****
, Normal= regular sinus, sinus tachy, sinus brady
Six Second Method: Count number of QRS complexes in a 6 second strip then multiply
by 10
Rule of 300: Find QRS interval hitting exactly a vertical line then go 300 → 150 → 100 →
75 until next interval
- 1500 method: Count large boxes between R-waves until the next wave going 5 -> 10 ->
15->. Then do 1500/x; if you land on a small box count by ones; if you get a decimal,
round up (ex. 1500/19= 78.5 -> 79)
Paroxysmal Supraventricular Tachycardia - ANSWER - HR: 150-220 BPM
(doesn't allow heart to contract effectively for perfusion)
Causes include the following: excess intake of alcohol, stress, caffeine intake,
overactive thyroid or excess use of thyroid hormone, and certain drugs. Anxiety
Sometimes persons with anxiety have this which results in high BP.
Interventions: cool then terminate, Vagal Maneuver; if ineffective administer Adenosine
(MD needs to be in the room and strip off a recording of EKG with a note of when
Adenosine was administered; if that doesn't work, cardiovert them but they must be
sedated
***PRECAUTION: Adenosine has a half-life of 10 seconds meaning it is fast so it is
important to push it fast in peripheral IV and flush it very quickly right after
Atrial Flutter - ANSWER - HR: 250-400 bpm
- Sharp P-waves and numerous p-waves for one QT interval
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