Exam Questions and Answers |
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SA node - ANSWER ✔✔60-100 bpm
Av node - ANSWER ✔✔40-60 bpm
Purkinje fibers - ANSWER ✔✔20-40 bpm
depolarization - ANSWER ✔✔electrical excitation of the cell
membrane normally followed by mechanical contraction
repolarization - ANSWER ✔✔return of the cell membrane to its
resting state normally followed by mechanical relaxation
, PR interval - ANSWER ✔✔0.12-0.20
QRS interval - ANSWER ✔✔0.06-0.11
QT interval - ANSWER ✔✔0.44-0.48 depending on rate
nursing responsibilities - ANSWER ✔✔print/measure/interpret
rhythm strips, get a 12 lead EKG for any rhythm changes, get a set of
VS for any rhythm changes, know when to notify MD
Sinus Arrhythmia - ANSWER ✔✔rate is normal but speeds and
slows with respiration (rhythm is irregular)
Treatment: asymptomatic - nothing, symptomatic - treat and find the
underlying cause (digoxin toxicity or MI)
Sinus Bradycardia - ANSWER ✔✔Treatment: if S/S are present give
atropine 0.5 mg - if unsuccessful then do an external/transvenous
pacemaker
- hold drugs that decrease HR: digoxin, beta blockers
Sinus Tachycardia - ANSWER ✔✔Rate of 100-150
Treatment: treat the underlying cause
PACs - ANSWER ✔✔Treatment: rarely treated, observe and
document the frequency and the patient's condition