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IBHRE CEPS Exam Questions and
Correct Answers the Latest Update
Ohm's law equation
✓ V=IR
EKG monitored patient should be __________, monitor chassis should be
___________ (nonconductive). Why
✓ ungrounded, grounded. Grounded patient would be able to conduct leakage
currents. we dont want this
lb to kg
✓ 2.2 lb = 1 kg
F to C
✓ C=5/9(F-32)
C to F
✓ F=9/5C+32
3 things that change automaticity of automatic cells
✓ 1. slope of phase 4
✓ 2. Change of threshold potential
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✓ 3. Change of resting membrane potential
a systole is represented by what portion of the ECG
✓ QT interval
What is main ion transfer during systole
✓ K+ seeps out, Ca2+ enters
At rest, what is intracellular/extracellular environment
✓ inside negative, outside positive
What phase of AP is resting membrane potential
✓ phase 4
Nodal depolarization occurs via what channel
✓ Ca2+ slow channel
Cardiac muscle cell depol occurs via what channel
✓ Na+ fast channel
During which phases is cell refractory
✓ 1,2,3
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TDP caused by what mechanism usually
✓ EAD's (triggered activity)
Variance
✓ Take each number in sample, subtract each number from mean, square each
difference, add all, divide sum by number in sample -1
Standard deviation
✓ square root of variance
P value
✓ Probability of certainty / smaller p value means the more likely the result could not
occur by chance
survival curve showing % of patients surviving treatment over time
✓ Kaplan - Meier curves
when measuring EGM's, earliest atrial activation usually from _____ and earliest
ventricular usually from ______
✓ P wave / QRS
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