IBHRE EXAM NEWEST 2024 ACTUAL EXAM COMPLETE
425 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT) /ALREADY GRADED A+
Ohm's law equation - ANSWER: V=IR
EKG monitored patient should be __________, monitor chassis should be
___________ (nonconductive). Why - ANSWER: ungrounded, grounded. Grounded
patient would be able to conduct leakage currents. we dont want this
lb to kg - ANSWER: 2.2 lb = 1 kg
F to C - ANSWER: C=5/9(F-32)
C to F - ANSWER: F=9/5C+32
3 things that change automaticity of automatic cells - ANSWER: 1. slope of phase 4
2. Change of threshold potential
3. Change of resting membrane potential
a systole is represented by what portion of the ECG - ANSWER: QT interval
What is main ion transfer during systole - ANSWER: K+ seeps out, Ca2+ enters
At rest, what is intracellular/extracellular environment - ANSWER: inside negative,
outside positive
What phase of AP is resting membrane potential - ANSWER: phase 4
Nodal depolarization occurs via what channel - ANSWER: Ca2+ slow channel
Cardiac muscle cell depol occurs via what channel - ANSWER: Na+ fast channel
During which phases is cell refractory - ANSWER: 1,2,3
TDP caused by what mechanism usually - ANSWER: EAD's (triggered activity)
Variance - ANSWER: Take each number in sample, subtract each number from mean,
square each difference, add all, divide sum by number in sample -1
Standard deviation - ANSWER: square root of variance
P value - ANSWER: 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 - ANSWER:
Kaplan - Meier curves
when measuring EGM's, earliest atrial activation usually from _____ and earliest
ventricular usually from ______ - ANSWER: P wave / QRS
Morady maneuver is used to differentiate - ANSWER: differentiate AT from
AVNRT/AVRT
Most common arrhythmia - ANSWER: AF
Most common SVT - ANSWER: AVNRT
What type of single use devices can be resterilized and why? - ANSWER: Diagnostic
EP electrodes because lumen and technically not a catheter because no lumen
Fr to mm - ANSWER: 1 Fr = .33 mm
Tip inner diameter standard diagnostic cardiac catheters and why - ANSWER: .038
inch / because it is supposed to be used with .035-.038 inch guide wires
What is 2 rules for CMC's like spiral or lasso - ANSWER: 1. Only approved for use in
LA due to chordae tendinea
2. Only rotate shaft clockwise
Stereotaxis catheters - ANSWER: Have magnets in tip for maneuverability in
response to changes in magnetic field
What system remotely steers guided catheters - ANSWER: Hansen robotic system
ACT for using array - ANSWER: ACT 250-300
bipolar cardiac electrodes record local _________ that occur during phase _______ -
ANSWER: depolarizations / phase 0
surface EKG leads usually filtered at what - ANSWER: .1 - 100 Hz
Normal EGM filter settings - ANSWER: 30 - 300 Hz
What to do if T waves interfere with A/V and why - ANSWER: Increase the high pass
filter because T waves are lower frequency as well as far field
Unipolar filter setting - ANSWER: .05 - 300 Hz
How each is measured: Diagnostic catheter OD , Inflated balloon cath OD, Needle
OD, Guide wire - ANSWER: Diag: Fr / Balloon: mm / Needle: gauge / GW: inch
(thousandth of inches)
425 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT) /ALREADY GRADED A+
Ohm's law equation - ANSWER: V=IR
EKG monitored patient should be __________, monitor chassis should be
___________ (nonconductive). Why - ANSWER: ungrounded, grounded. Grounded
patient would be able to conduct leakage currents. we dont want this
lb to kg - ANSWER: 2.2 lb = 1 kg
F to C - ANSWER: C=5/9(F-32)
C to F - ANSWER: F=9/5C+32
3 things that change automaticity of automatic cells - ANSWER: 1. slope of phase 4
2. Change of threshold potential
3. Change of resting membrane potential
a systole is represented by what portion of the ECG - ANSWER: QT interval
What is main ion transfer during systole - ANSWER: K+ seeps out, Ca2+ enters
At rest, what is intracellular/extracellular environment - ANSWER: inside negative,
outside positive
What phase of AP is resting membrane potential - ANSWER: phase 4
Nodal depolarization occurs via what channel - ANSWER: Ca2+ slow channel
Cardiac muscle cell depol occurs via what channel - ANSWER: Na+ fast channel
During which phases is cell refractory - ANSWER: 1,2,3
TDP caused by what mechanism usually - ANSWER: EAD's (triggered activity)
Variance - ANSWER: Take each number in sample, subtract each number from mean,
square each difference, add all, divide sum by number in sample -1
Standard deviation - ANSWER: square root of variance
P value - ANSWER: 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 - ANSWER:
Kaplan - Meier curves
when measuring EGM's, earliest atrial activation usually from _____ and earliest
ventricular usually from ______ - ANSWER: P wave / QRS
Morady maneuver is used to differentiate - ANSWER: differentiate AT from
AVNRT/AVRT
Most common arrhythmia - ANSWER: AF
Most common SVT - ANSWER: AVNRT
What type of single use devices can be resterilized and why? - ANSWER: Diagnostic
EP electrodes because lumen and technically not a catheter because no lumen
Fr to mm - ANSWER: 1 Fr = .33 mm
Tip inner diameter standard diagnostic cardiac catheters and why - ANSWER: .038
inch / because it is supposed to be used with .035-.038 inch guide wires
What is 2 rules for CMC's like spiral or lasso - ANSWER: 1. Only approved for use in
LA due to chordae tendinea
2. Only rotate shaft clockwise
Stereotaxis catheters - ANSWER: Have magnets in tip for maneuverability in
response to changes in magnetic field
What system remotely steers guided catheters - ANSWER: Hansen robotic system
ACT for using array - ANSWER: ACT 250-300
bipolar cardiac electrodes record local _________ that occur during phase _______ -
ANSWER: depolarizations / phase 0
surface EKG leads usually filtered at what - ANSWER: .1 - 100 Hz
Normal EGM filter settings - ANSWER: 30 - 300 Hz
What to do if T waves interfere with A/V and why - ANSWER: Increase the high pass
filter because T waves are lower frequency as well as far field
Unipolar filter setting - ANSWER: .05 - 300 Hz
How each is measured: Diagnostic catheter OD , Inflated balloon cath OD, Needle
OD, Guide wire - ANSWER: Diag: Fr / Balloon: mm / Needle: gauge / GW: inch
(thousandth of inches)
