IMPLANTABLE CARDIOVERTER DEFIBRILLATOR (ICD) MANAGEMENT
CERTIFICATION EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES Q&A INSTANT DOWNLOAD PDF
149 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Apply current guidelines for ICD implantation and programming
2 Diagnose and manage device-related complications and malfunctions
3 Interpret device diagnostics and electrograms to guide clinical decisions
4 Evaluate the impact of ICDs on patient outcomes and quality of life
5 Implantable Cardioverter Defibrillator
6 Management Certification Exam Practice Questions And Correct Answers
7 Verified Answers
8 Plus Rationales Q&A Instant Download Pdf
9 Foundations of Cardiac Electrophysiology / ICD Management
10 Applied Cardiac Electrophysiology / ICD Management
11 Advanced Cardiac Electrophysiology / ICD Management
12 Cardiac Electrophysiology / ICD Management Review
Page 1
,Q1 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a dual-chamber ICD receives a shock. Interrogation shows the
episode stored as VF with a cycle length of 240 ms. The device had been
programmed with a VF zone at 200 bpm and a VT zone at 170 bpm with SVT
discriminators on. The episode was detected in the VF zone and shocked. The
patient was in atrial fibrillation with a rapid ventricular rate. What is the most likely
reason the SVT discriminators did not prevent the shock?
A. SVT discriminators are not applied in the VF zone CORRECT
B. The atrial rate was faster than the ventricular rate
C. The device was programmed to a single-chamber mode
D. Morphology matching was disabled
RATIONALE: SVT discriminators (e.g., onset, stability, morphology) are typically only active in the
VT zone, not in the VF zone. Once the ventricular rate exceeds the VF threshold, the device
treats it as VF regardless of SVT discriminators. The other options are incorrect because AF with
rapid ventricular rate would still be detected as VF if the rate is in the VF zone, and
single-chamber mode or morphology settings would not affect VF detection.
Q2 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with an ICD undergoes elective generator replacement. The new device
is from a different manufacturer. Which of the following is the most critical
consideration regarding the lead connector and compatibility?
A. The lead's pacing threshold and impedance must be within normal limits
B. The header of the new generator must accept the existing lead's connector pin diameter
CORRECT
C. The lead's sensing amplitude must be reprogrammed after connection
D. The magnet response should be tested after the procedure
RATIONALE: The most critical issue when using a different manufacturer's generator is
connector compatibility. The header must match the lead's connector standard (e.g., IS-1, DF-1,
or DF-4). If incompatible, an adapter may be required. While thresholds and sensing are
important, they are not the primary compatibility issue. Magnet response testing is routine but not
the most critical.
Page 2
,Q3 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a single-chamber ICD presents with multiple inappropriate shocks.
Interrogation reveals the episodes were classified as VF due to a rapid ventricular
rate, but the electrogram shows noise oversensing. The lead impedance is normal.
Which of the following is the most likely cause?
A. Lead fracture
B. Oversensing of T waves
C. Electromagnetic interference (EMI) CORRECT
D. Myopotential oversensing
RATIONALE: Normal lead impedance makes lead fracture less likely. T-wave oversensing
typically occurs at slower rates and would not cause VF detection. Myopotential oversensing is
less common with modern filters. EMI from external sources (e.g., electrocautery, MRI) can
cause high-frequency noise that is sensed as VF, leading to inappropriate shocks. The normal
impedance and noise pattern on the electrogram point to EMI.
Q4 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
According to current guidelines, which of the following patients with heart failure
and reduced ejection fraction is MOST appropriate for primary prevention ICD
implantation?
A. NYHA class IV symptoms on optimal medical therapy for 3 months
B. Ischemic cardiomyopathy with LVEF 30% and a QRS duration of 150 ms with LBBB
C. Non-ischemic cardiomyopathy with LVEF 35% and NYHA class II on optimal therapy for at
least 3 months CORRECT
D. Recent (within 40 days) myocardial infarction with LVEF 30% on day 5
RATIONALE: Guidelines recommend ICD for primary prevention in patients with non-ischemic
cardiomyopathy, LVEF 35%, and NYHA class II-III on optimal medical therapy for at least 3
months, with reasonable life expectancy. NYHA IV is not an indication unless CRT is planned.
Ischemic patients with LBBB and QRS 150 ms may be candidates for CRT-D, but the question
asks for ICD alone. Recent MI within 40 days is a contraindication for primary prevention ICD.
Page 3
, Q5 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with an ICD experiences a shock while awake and sitting. Interrogation
shows an episode of monomorphic VT at 200 bpm that was terminated by the
shock. The device is programmed with a VT zone at 180 bpm with ATP enabled.
Why did the device shock instead of delivering ATP?
A. ATP was programmed off for that zone
B. The VT was faster than the ATP upper limit
C. The device detected the episode as VF because the rate exceeded the VF threshold
D. ATP was attempted but failed to terminate the VT CORRECT
RATIONALE: The VT rate is 200 bpm, which is within the VT zone (if programmed with a VF
zone at, say, 240 bpm). ATP is delivered first; if it fails, the device typically escalates to shock.
The question states the shock terminated the VT, implying ATP was attempted and failed. The
other options are less likely because ATP is typically enabled in the VT zone, and the rate is not
necessarily above the VF threshold.
Q6 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a dual-chamber ICD is found to have atrial lead dislodgement.
Which of the following device findings is most consistent with this complication?
A. Loss of atrial capture with high pacing threshold CORRECT
B. Increased atrial sensing amplitude
C. Normal atrial lead impedance
D. Ventricular pacing at the lower rate limit
RATIONALE: Atrial lead dislodgement typically results in loss of atrial capture, high pacing
threshold, and often undersensing. Impedance may be abnormal but not always. Increased
sensing amplitude is unlikely. Ventricular pacing at the lower rate limit may occur if the device is
in DDD mode and the atrial channel fails to sense, but it is not the most specific finding. The
most consistent is loss of capture with high threshold.
Page 4
CERTIFICATION EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES Q&A INSTANT DOWNLOAD PDF
149 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Apply current guidelines for ICD implantation and programming
2 Diagnose and manage device-related complications and malfunctions
3 Interpret device diagnostics and electrograms to guide clinical decisions
4 Evaluate the impact of ICDs on patient outcomes and quality of life
5 Implantable Cardioverter Defibrillator
6 Management Certification Exam Practice Questions And Correct Answers
7 Verified Answers
8 Plus Rationales Q&A Instant Download Pdf
9 Foundations of Cardiac Electrophysiology / ICD Management
10 Applied Cardiac Electrophysiology / ICD Management
11 Advanced Cardiac Electrophysiology / ICD Management
12 Cardiac Electrophysiology / ICD Management Review
Page 1
,Q1 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a dual-chamber ICD receives a shock. Interrogation shows the
episode stored as VF with a cycle length of 240 ms. The device had been
programmed with a VF zone at 200 bpm and a VT zone at 170 bpm with SVT
discriminators on. The episode was detected in the VF zone and shocked. The
patient was in atrial fibrillation with a rapid ventricular rate. What is the most likely
reason the SVT discriminators did not prevent the shock?
A. SVT discriminators are not applied in the VF zone CORRECT
B. The atrial rate was faster than the ventricular rate
C. The device was programmed to a single-chamber mode
D. Morphology matching was disabled
RATIONALE: SVT discriminators (e.g., onset, stability, morphology) are typically only active in the
VT zone, not in the VF zone. Once the ventricular rate exceeds the VF threshold, the device
treats it as VF regardless of SVT discriminators. The other options are incorrect because AF with
rapid ventricular rate would still be detected as VF if the rate is in the VF zone, and
single-chamber mode or morphology settings would not affect VF detection.
Q2 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with an ICD undergoes elective generator replacement. The new device
is from a different manufacturer. Which of the following is the most critical
consideration regarding the lead connector and compatibility?
A. The lead's pacing threshold and impedance must be within normal limits
B. The header of the new generator must accept the existing lead's connector pin diameter
CORRECT
C. The lead's sensing amplitude must be reprogrammed after connection
D. The magnet response should be tested after the procedure
RATIONALE: The most critical issue when using a different manufacturer's generator is
connector compatibility. The header must match the lead's connector standard (e.g., IS-1, DF-1,
or DF-4). If incompatible, an adapter may be required. While thresholds and sensing are
important, they are not the primary compatibility issue. Magnet response testing is routine but not
the most critical.
Page 2
,Q3 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a single-chamber ICD presents with multiple inappropriate shocks.
Interrogation reveals the episodes were classified as VF due to a rapid ventricular
rate, but the electrogram shows noise oversensing. The lead impedance is normal.
Which of the following is the most likely cause?
A. Lead fracture
B. Oversensing of T waves
C. Electromagnetic interference (EMI) CORRECT
D. Myopotential oversensing
RATIONALE: Normal lead impedance makes lead fracture less likely. T-wave oversensing
typically occurs at slower rates and would not cause VF detection. Myopotential oversensing is
less common with modern filters. EMI from external sources (e.g., electrocautery, MRI) can
cause high-frequency noise that is sensed as VF, leading to inappropriate shocks. The normal
impedance and noise pattern on the electrogram point to EMI.
Q4 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
According to current guidelines, which of the following patients with heart failure
and reduced ejection fraction is MOST appropriate for primary prevention ICD
implantation?
A. NYHA class IV symptoms on optimal medical therapy for 3 months
B. Ischemic cardiomyopathy with LVEF 30% and a QRS duration of 150 ms with LBBB
C. Non-ischemic cardiomyopathy with LVEF 35% and NYHA class II on optimal therapy for at
least 3 months CORRECT
D. Recent (within 40 days) myocardial infarction with LVEF 30% on day 5
RATIONALE: Guidelines recommend ICD for primary prevention in patients with non-ischemic
cardiomyopathy, LVEF 35%, and NYHA class II-III on optimal medical therapy for at least 3
months, with reasonable life expectancy. NYHA IV is not an indication unless CRT is planned.
Ischemic patients with LBBB and QRS 150 ms may be candidates for CRT-D, but the question
asks for ICD alone. Recent MI within 40 days is a contraindication for primary prevention ICD.
Page 3
, Q5 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with an ICD experiences a shock while awake and sitting. Interrogation
shows an episode of monomorphic VT at 200 bpm that was terminated by the
shock. The device is programmed with a VT zone at 180 bpm with ATP enabled.
Why did the device shock instead of delivering ATP?
A. ATP was programmed off for that zone
B. The VT was faster than the ATP upper limit
C. The device detected the episode as VF because the rate exceeded the VF threshold
D. ATP was attempted but failed to terminate the VT CORRECT
RATIONALE: The VT rate is 200 bpm, which is within the VT zone (if programmed with a VF
zone at, say, 240 bpm). ATP is delivered first; if it fails, the device typically escalates to shock.
The question states the shock terminated the VT, implying ATP was attempted and failed. The
other options are less likely because ATP is typically enabled in the VT zone, and the rate is not
necessarily above the VF threshold.
Q6 APPLY CURRENT GUIDELINES FOR ICD IMPLANTATION AND PROGRAMMING
A patient with a dual-chamber ICD is found to have atrial lead dislodgement.
Which of the following device findings is most consistent with this complication?
A. Loss of atrial capture with high pacing threshold CORRECT
B. Increased atrial sensing amplitude
C. Normal atrial lead impedance
D. Ventricular pacing at the lower rate limit
RATIONALE: Atrial lead dislodgement typically results in loss of atrial capture, high pacing
threshold, and often undersensing. Impedance may be abnormal but not always. Increased
sensing amplitude is unlikely. Ventricular pacing at the lower rate limit may occur if the device is
in DDD mode and the atrial channel fails to sense, but it is not the most specific finding. The
most consistent is loss of capture with high threshold.
Page 4
