NCAL KAISER EKG ACTUAL EXAM TEST BANK 2026 COMPLETE with complete QUESTIONS AND VERIFIED ANSWERS

NCAL KAISER EKG ACTUAL EXAM TEST BANK 2026
COMPLETE with complete QUESTIONS AND VERIFIED
ANSWERS


contraction
cardiac cells shorten = muscular contraction in
response to electrical stimulus




sa node
- primary pacemaker of heart
- 60-90 bpm




av node
delay = atrial contraction + ventricular filling
- 40-60 bpm




bundle of his
ability to self initiate electrical activity
- 40-60 bpm


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,purkinje fibers
network of fibers that carry electrical impulse to
ventricular muscle cells
- 20-40 bpm




NSR
Brady
Tachy
SVT
Junctional
Ventricular rhythm
NSR 60-100
Brady 40-60
Tachy >100
SVT >150
Junctional 40-60
Ventricular rhythm 20 - 40




PR interval

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,0.12-0.20
beginning of p to beginning of qrs




qrs interval
< 0.12
beginning of q to end of s


depolarization
- inside of cell becomes positive, outside negative
- contraction
- na+ channel opens
- ELECTRICAL




repolarization
movement of cells = inside is negative again
- na+ channels close, k+ channels open
- MECHANICAL




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, p wave
qrs wave
t wave
- (p) atrial depolarization
- (qrs) ventricular depolarization
- (t) ventricular repolarization




refractory period
per of time where cardiac cells cannot respond to
stimulus




absolute refractory period
beginning of qrs to peak of t wave




relative refractory (vulnerable per of repolarization)
- cardiac cells have repolarized enough to respond to
strong stimulus
- during this per a strong stimulus may overtake the
pacemaker of the heart


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