P age | 1 | | | | | ||
CCDS IBHRE EXAM 2026 UPDATED EXAM
WITH VERIFIED SOLUTIONS.
DDI mode is indicated for... - correct answer -sinus node
|| || || || || || || || ||
dysfunction with tachy-brady syndrome
|| || || ||
DFT margin of safety - correct answer -more than 10J
|| || || || || || || || ||
also consider lead orientations, reversing shock polarity, testing a
|| || || || || || || ||
different shock morphology such as biphasic and multiphasic
|| || || || || || || ||
shocks, epicardial leads
|| || ||
current of injury pattern is demonstrated by.. - correct answer -ST
|| || || || || || || || || ||
segment elevation which reflects local trauma from the electrode
|| || || || || || || || ||
pressing on the endocardium
|| || || ||
The medtronic pacing system revert to what mode when battery
|| || || || || || || || ||
depletion is at RRT? - correct answer -VVI at 65bpm
|| || || || || || || || || ||
charge = current x time (pulse duration) - correct answer -x axis =
|| || || || || || || || || || || ||
current
||
y axis = time
|| || ||
, P age | 2
| | | | | ||
how to recognize extended rate hysteresis - correct answer -the
|| || || || || || || || ||
escape interval following a sensed complex is longer, hence the
|| || || || || || || || || ||
rate is slower, than the interval between two consecutive paced
|| || || || || || || || || ||
complexes
||
purpose of the refractory period after a ventricular beat - correct
|| || || || || || || || || ||
answer -to prevent the pacemaker from sensing and recycling on
|| || || || || || || || || ||
known but inappropriate physiologic and nonphysiologic signals
|| || || || || || ||
following release of a pacemaker output or sensing of native
|| || || || || || || || || ||
depolarization
||
fusion beat - correct answer -occurs when depolarization of a
|| || || || || || || || ||
given cardiac chamber(SAME CHAMBER) occurs simultaneously
|| || || || || ||
from two different sources
|| || || ||
eg a conducted ventricular complex and a ventricular ectopic beat
|| || || || || || || || ||
or a conducted complex and a paced beat
|| || || || || || || ||
pseudofusion beat - correct answer -a native complex deformed || || || || || || || ||
by a pacing stimulus but where the pacemaker output does not
|| || || || || || || || || || ||
contribute to the cardiac depolarization
|| || || || ||
, P age | 3
| | | | | ||
true fusion beat - correct answer -is the same as a fusion beat
|| || || || || || || || || || || ||
which occurs when depolarization of a given cardiac chamber
|| || || || || || || || ||
occurs simultaneously from two different sources
|| || || || || ||
pseudopseudofusion beat - correct answer -the atrial stimulus || || || || || || ||
coincides when the first portion of a wide QRS complex and a
|| || || || || || || || || || || ||
pseudofusion beat where the ventricular stimulus deforms the
|| || || || || || || ||
terminal portion of he same QRS complex
|| || || || || || ||
Most common cause of oversensing in AAI pacing system -
|| || || || || || || || ||
correct answer -R wave
|| || || ||
treatment: lengthen the refractory period || || || ||
lead insulation defect will lead to - correct answer -undersensing,
|| || || || || || || || ||
oversensing, and extracardiac muscle stimulation
|| || || || ||
Fall in stimulation impedance in a constant voltage pacing system
|| || || || || || || || ||
will lead to - correct answer -increase capture threshold and
|| || || || || || || || || ||
decrease pulse generator longevity
|| || || ||
, P age | 4 | | | | | ||
Release of a ventricular stimulation from a DDD pacing system
|| || || || || || || || ||
requires - correct answer -completion of the AV interval and
|| || || || || || || || || ||
completion of the upper rate limit interval
|| || || || || || ||
mode to avoid true crosstalk in dual chamber pacemaker - correct
|| || || || || || || || || ||
answer -commited DVI pacing since there will be no ventricular
|| || || || || || || || || ||
sensing following atrial output stimulus
|| || || || ||
1 hertz equals to how many bpm? - correct answer -1 Hz = 60 bpm
|| || || || || || || || || || || || || ||
electrolyte abnormality causes increase stimulation threshold,
|| || || || ||
wide QRS, latency, and undersensing - correct answer -
|| || || || || || || || ||
hyperkalemia
||
virtual electrode or fibrous capsule... - correct answer -- normal
|| || || || || || || || ||
foreign body reaction
|| || ||
- an inexcitable capsule of tissue
|| || || ||
- decreases the current density at the lead tissue interface || || || || || || || ||
CCDS IBHRE EXAM 2026 UPDATED EXAM
WITH VERIFIED SOLUTIONS.
DDI mode is indicated for... - correct answer -sinus node
|| || || || || || || || ||
dysfunction with tachy-brady syndrome
|| || || ||
DFT margin of safety - correct answer -more than 10J
|| || || || || || || || ||
also consider lead orientations, reversing shock polarity, testing a
|| || || || || || || ||
different shock morphology such as biphasic and multiphasic
|| || || || || || || ||
shocks, epicardial leads
|| || ||
current of injury pattern is demonstrated by.. - correct answer -ST
|| || || || || || || || || ||
segment elevation which reflects local trauma from the electrode
|| || || || || || || || ||
pressing on the endocardium
|| || || ||
The medtronic pacing system revert to what mode when battery
|| || || || || || || || ||
depletion is at RRT? - correct answer -VVI at 65bpm
|| || || || || || || || || ||
charge = current x time (pulse duration) - correct answer -x axis =
|| || || || || || || || || || || ||
current
||
y axis = time
|| || ||
, P age | 2
| | | | | ||
how to recognize extended rate hysteresis - correct answer -the
|| || || || || || || || ||
escape interval following a sensed complex is longer, hence the
|| || || || || || || || || ||
rate is slower, than the interval between two consecutive paced
|| || || || || || || || || ||
complexes
||
purpose of the refractory period after a ventricular beat - correct
|| || || || || || || || || ||
answer -to prevent the pacemaker from sensing and recycling on
|| || || || || || || || || ||
known but inappropriate physiologic and nonphysiologic signals
|| || || || || || ||
following release of a pacemaker output or sensing of native
|| || || || || || || || || ||
depolarization
||
fusion beat - correct answer -occurs when depolarization of a
|| || || || || || || || ||
given cardiac chamber(SAME CHAMBER) occurs simultaneously
|| || || || || ||
from two different sources
|| || || ||
eg a conducted ventricular complex and a ventricular ectopic beat
|| || || || || || || || ||
or a conducted complex and a paced beat
|| || || || || || || ||
pseudofusion beat - correct answer -a native complex deformed || || || || || || || ||
by a pacing stimulus but where the pacemaker output does not
|| || || || || || || || || || ||
contribute to the cardiac depolarization
|| || || || ||
, P age | 3
| | | | | ||
true fusion beat - correct answer -is the same as a fusion beat
|| || || || || || || || || || || ||
which occurs when depolarization of a given cardiac chamber
|| || || || || || || || ||
occurs simultaneously from two different sources
|| || || || || ||
pseudopseudofusion beat - correct answer -the atrial stimulus || || || || || || ||
coincides when the first portion of a wide QRS complex and a
|| || || || || || || || || || || ||
pseudofusion beat where the ventricular stimulus deforms the
|| || || || || || || ||
terminal portion of he same QRS complex
|| || || || || || ||
Most common cause of oversensing in AAI pacing system -
|| || || || || || || || ||
correct answer -R wave
|| || || ||
treatment: lengthen the refractory period || || || ||
lead insulation defect will lead to - correct answer -undersensing,
|| || || || || || || || ||
oversensing, and extracardiac muscle stimulation
|| || || || ||
Fall in stimulation impedance in a constant voltage pacing system
|| || || || || || || || ||
will lead to - correct answer -increase capture threshold and
|| || || || || || || || || ||
decrease pulse generator longevity
|| || || ||
, P age | 4 | | | | | ||
Release of a ventricular stimulation from a DDD pacing system
|| || || || || || || || ||
requires - correct answer -completion of the AV interval and
|| || || || || || || || || ||
completion of the upper rate limit interval
|| || || || || || ||
mode to avoid true crosstalk in dual chamber pacemaker - correct
|| || || || || || || || || ||
answer -commited DVI pacing since there will be no ventricular
|| || || || || || || || || ||
sensing following atrial output stimulus
|| || || || ||
1 hertz equals to how many bpm? - correct answer -1 Hz = 60 bpm
|| || || || || || || || || || || || || ||
electrolyte abnormality causes increase stimulation threshold,
|| || || || ||
wide QRS, latency, and undersensing - correct answer -
|| || || || || || || || ||
hyperkalemia
||
virtual electrode or fibrous capsule... - correct answer -- normal
|| || || || || || || || ||
foreign body reaction
|| || ||
- an inexcitable capsule of tissue
|| || || ||
- decreases the current density at the lead tissue interface || || || || || || || ||
