IBHRE CCDS/ TEST FINAL EXAM ACTUAL
EXAM COMPLETE ACCURATE EXAM
QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT ANSWERS) /
ALREADY GRADED A+
What current ICD capacitor technologies provide the highest energy density and do
not require reformation? - ANSWER-Tantalum Electrolytic
1.67 Hz would equal how many bpm? - ANSWER-100 bpm
1 bpm = 0.0166667 Hz
Which pace/sense lead designs would one expect the highest current density w/ a
bipolar impedance reading of 1100 ohms? - ANSWER-Brady lead w/ anode of 4.2
mm2 and cathode 5.2 mm2
What is the voltage measurement of a pacing system w/ impedance of 500 ohms,
current of 5.0 milliamp and pulse width of 0.4 ms and rate of 60 bpm? -
ANSWER-V = 2.5 V
V=I x R
= 5.0 milliamps x 500 ohms
= 2,500 millivolts
=2,500/1000
What condition is shown to have an increase stimulation threshold, wide QRS,
latency, or under sensing? - ANSWER-Hyperkalemia (high potassium)
What is the estimated battery longevity of a pacemaker with 1.0 amp-hour battery
and 20 microamp drain - ANSWER-Longevity = 114 x (amp-hours/microamp
drain)
= 114 x (1.0/20)
= 5.7 years
,Which sensing related parameter represents the maximal rate of change of the
electrical potential between the sensing electrode and is the first derivative of the
electrogram? - ANSWER-Slew rate
The isovolumetric time from electrical depolarization of the heart to mechanical
systole describes what term? - ANSWER-Pre-ejection interval
What test is typically performed during exercise with HR around 105-115 and was
shown to have a negative predictive value in MADIT II and SCD-HeFT? -
ANSWER-Micro volt t-wave alternans
Which battery chemistry is now incorporated into pacemakers? - ANSWER-
Lithium silver vanadium & lithium carbon mono fluoride
What test is performed over 10-20 beats following a PVC and whose absence is a
predictor of cardiac mortality following an MI? - ANSWER-Micro volt t-wave
alternans
Fluoroquinolones, a new gen antibiotic is known for which cardiac effect? -
ANSWER-Prolonging QT
What would decrease stim thresholds and current drain? - ANSWER-Reducing
electrode surface area
Ex: from 12mm to 8mm
Match the units: watt-second - ANSWER-Power
Defibrillation energies exceed pacing energies by a factor of? - ANSWER-
1,000,000
A band-pass filter modifies incoming signals according to which of the following
units of measure? - ANSWER-Hertz
AV block occurs in what percentage of congenital open-heart surgeries? -
ANSWER-1-3%
,In order to have a pacing system automatically assess capture and thresholds, the
essential electrode characteristics would be? - ANSWER-Minimal electrode
diameter size
In a normal person, stroke volume increases by what % when exercising? -
ANSWER-50%
In pacing, capacitors are: - ANSWER-Charged in parallel and discharged in series
In a circuit with resistance of 500 ohms and 600 ohms in the parallel circuit the
resistance would be? - ANSWER-R total = R1 x R2
————
(R1 + R2)
= (500 x 600)
——————-
(500 + 600)
= 272.7 ohms
Battery capacity of a pacemaker is given in which parameter? - ANSWER-Current
Most commonly utilized battery in current ICDs? - ANSWER-Lithium silver
vanadium oxide
What does one French size equal in mm? - ANSWER-0.3mm
What drug will increase DFT within 2 days? - ANSWER-Flecainide
What drug might be given to reduce pacing thresholds? - ANSWER-Isoproterenol
IV
Which pacing indication would most likely use Rate drop response, sudden Brady
response or rate hysteresis? - ANSWER-Carotid sinus hypersensitivity
What was a secondary endpoint finding CTOPP and MOST studies comparing
atrial vs ventricle pacing? - ANSWER-Reduced onset of AF
, Patient with long QT getting ICD. What drug should be avoided due to increased
risk of Torsades De Pointes - ANSWER-Erythromycin
What drug may reduce digoxin clearance by 30% resulting in the need to reduce
digoxin dose and retitrate based on serum levels? - ANSWER-Amiodarone
What drug may significantly lower myocardial stimulation thresholds? -
ANSWER-Verapamil
Proper lead position in a child who has undergone a Fontan procedure? -
ANSWER-Epicardial V lead, with subsequent transvenous A lead
What causes cardiac C fibers in patients exhibiting vasodepressor syncope? -
ANSWER-Vigorous squeezing of relatively empty ventricles
Approximate infection rate of CRTD implant in a normal healthy male? -
ANSWER-2-4%
Lead extraction morbidity and mortality rate? - ANSWER-1-3%
What is the normal range of PCWP? - ANSWER-4-12 mm/Hg
What is the most dangerous interaction between RF ablation and pacemakers? -
ANSWER-Runaway pacing
Most common reason for ICD classifies false VT/VF? - ANSWER-EMI
Which of the following is a Class III indication for ICD implant?
- VT not due to reversible cause
- severely symptomatic VT while patient awaits transplant
- Incessant VT
- NSVT, previous MI, positive EP Study - ANSWER-VT not due to reversible
cause
An EP takes a retrospective look at 360 consecutive ICD patients to gather data
one his patient survival statistic. It uncovers one pharmacological factor was linked
to better patient survival, what is it? - ANSWER-Beta blocker therapy
EXAM COMPLETE ACCURATE EXAM
QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT ANSWERS) /
ALREADY GRADED A+
What current ICD capacitor technologies provide the highest energy density and do
not require reformation? - ANSWER-Tantalum Electrolytic
1.67 Hz would equal how many bpm? - ANSWER-100 bpm
1 bpm = 0.0166667 Hz
Which pace/sense lead designs would one expect the highest current density w/ a
bipolar impedance reading of 1100 ohms? - ANSWER-Brady lead w/ anode of 4.2
mm2 and cathode 5.2 mm2
What is the voltage measurement of a pacing system w/ impedance of 500 ohms,
current of 5.0 milliamp and pulse width of 0.4 ms and rate of 60 bpm? -
ANSWER-V = 2.5 V
V=I x R
= 5.0 milliamps x 500 ohms
= 2,500 millivolts
=2,500/1000
What condition is shown to have an increase stimulation threshold, wide QRS,
latency, or under sensing? - ANSWER-Hyperkalemia (high potassium)
What is the estimated battery longevity of a pacemaker with 1.0 amp-hour battery
and 20 microamp drain - ANSWER-Longevity = 114 x (amp-hours/microamp
drain)
= 114 x (1.0/20)
= 5.7 years
,Which sensing related parameter represents the maximal rate of change of the
electrical potential between the sensing electrode and is the first derivative of the
electrogram? - ANSWER-Slew rate
The isovolumetric time from electrical depolarization of the heart to mechanical
systole describes what term? - ANSWER-Pre-ejection interval
What test is typically performed during exercise with HR around 105-115 and was
shown to have a negative predictive value in MADIT II and SCD-HeFT? -
ANSWER-Micro volt t-wave alternans
Which battery chemistry is now incorporated into pacemakers? - ANSWER-
Lithium silver vanadium & lithium carbon mono fluoride
What test is performed over 10-20 beats following a PVC and whose absence is a
predictor of cardiac mortality following an MI? - ANSWER-Micro volt t-wave
alternans
Fluoroquinolones, a new gen antibiotic is known for which cardiac effect? -
ANSWER-Prolonging QT
What would decrease stim thresholds and current drain? - ANSWER-Reducing
electrode surface area
Ex: from 12mm to 8mm
Match the units: watt-second - ANSWER-Power
Defibrillation energies exceed pacing energies by a factor of? - ANSWER-
1,000,000
A band-pass filter modifies incoming signals according to which of the following
units of measure? - ANSWER-Hertz
AV block occurs in what percentage of congenital open-heart surgeries? -
ANSWER-1-3%
,In order to have a pacing system automatically assess capture and thresholds, the
essential electrode characteristics would be? - ANSWER-Minimal electrode
diameter size
In a normal person, stroke volume increases by what % when exercising? -
ANSWER-50%
In pacing, capacitors are: - ANSWER-Charged in parallel and discharged in series
In a circuit with resistance of 500 ohms and 600 ohms in the parallel circuit the
resistance would be? - ANSWER-R total = R1 x R2
————
(R1 + R2)
= (500 x 600)
——————-
(500 + 600)
= 272.7 ohms
Battery capacity of a pacemaker is given in which parameter? - ANSWER-Current
Most commonly utilized battery in current ICDs? - ANSWER-Lithium silver
vanadium oxide
What does one French size equal in mm? - ANSWER-0.3mm
What drug will increase DFT within 2 days? - ANSWER-Flecainide
What drug might be given to reduce pacing thresholds? - ANSWER-Isoproterenol
IV
Which pacing indication would most likely use Rate drop response, sudden Brady
response or rate hysteresis? - ANSWER-Carotid sinus hypersensitivity
What was a secondary endpoint finding CTOPP and MOST studies comparing
atrial vs ventricle pacing? - ANSWER-Reduced onset of AF
, Patient with long QT getting ICD. What drug should be avoided due to increased
risk of Torsades De Pointes - ANSWER-Erythromycin
What drug may reduce digoxin clearance by 30% resulting in the need to reduce
digoxin dose and retitrate based on serum levels? - ANSWER-Amiodarone
What drug may significantly lower myocardial stimulation thresholds? -
ANSWER-Verapamil
Proper lead position in a child who has undergone a Fontan procedure? -
ANSWER-Epicardial V lead, with subsequent transvenous A lead
What causes cardiac C fibers in patients exhibiting vasodepressor syncope? -
ANSWER-Vigorous squeezing of relatively empty ventricles
Approximate infection rate of CRTD implant in a normal healthy male? -
ANSWER-2-4%
Lead extraction morbidity and mortality rate? - ANSWER-1-3%
What is the normal range of PCWP? - ANSWER-4-12 mm/Hg
What is the most dangerous interaction between RF ablation and pacemakers? -
ANSWER-Runaway pacing
Most common reason for ICD classifies false VT/VF? - ANSWER-EMI
Which of the following is a Class III indication for ICD implant?
- VT not due to reversible cause
- severely symptomatic VT while patient awaits transplant
- Incessant VT
- NSVT, previous MI, positive EP Study - ANSWER-VT not due to reversible
cause
An EP takes a retrospective look at 360 consecutive ICD patients to gather data
one his patient survival statistic. It uncovers one pharmacological factor was linked
to better patient survival, what is it? - ANSWER-Beta blocker therapy
