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HCA Healthcare Telemetry ECG/EKG
Interpretation Exam Comprehensive Practice
Question Bank — 250 Advanced Multiple-Choice
Questions with Verified Answers and Detailed
Rationales
TITLE: HCA Healthcare Telemetry ECG/EKG Interpretation Competency Examination:
Comprehensive 250-Question Practice Bank Covering Sinus Rhythms, Atrial and Ventricular
Dysrhythmias, AV Blocks, Pacemaker Function, 12-Lead Interpretation, and Clinical
Management Aligned with 2026 AHA Guidelines
SECTION 1: CARDIAC ANATOMY AND ELECTROPHYSIOLOGY (Questions 1–20)
1. The sinoatrial (SA) node is located in which anatomical structure of the heart?
A) Interventricular septum
B) Right atrial wall near the superior vena cava
C) Left atrial appendage
D) Coronary sinus
Correct Answer: B
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Rationale: The SA node is located in the upper wall of the right atrium, near the opening of the
superior vena cava. It is the primary pacemaker of the heart, generating electrical impulses at a
rate of 60–100 beats per minute. The SA node's location is critical for understanding the origin
of normal sinus rhythms.
2. The normal intrinsic firing rate of the atrioventricular (AV) node is:
A) 60–100 beats per minute
B) 40–60 beats per minute
C) 20–40 beats per minute
D) 100–150 beats per minute
Correct Answer: B
Rationale: The AV node has an intrinsic firing rate of 40–60 beats per minute. It serves as the
secondary pacemaker when the SA node fails. The Purkinje fibers have the slowest intrinsic rate
of 20–40 beats per minute. Understanding these rates is essential for identifying escape
rhythms.
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3. The normal PR interval duration is:
A) 0.04–0.10 seconds
B) 0.12–0.20 seconds
C) 0.20–0.30 seconds
D) 0.30–0.40 seconds
Correct Answer: B
Rationale: The normal PR interval measures 0.12–0.20 seconds (3–5 small boxes on standard
ECG paper). It represents the time from the onset of atrial depolarization to the onset of
ventricular depolarization. Prolongation beyond 0.20 seconds indicates first-degree AV block.
4. Which of the following correctly describes the pathway of electrical conduction through
the heart?
A) AV node → SA node → Bundle of His → Purkinje fibers
B) SA node → AV node → Bundle of His → Bundle branches → Purkinje fibers
C) SA node → Bundle of His → AV node → Purkinje fibers
D) AV node → Bundle of His → SA node → Purkinje fibers
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Correct Answer: B
Rationale: The correct conduction pathway is: SA node → internodal pathways → AV node →
Bundle of His → left and right bundle branches → Purkinje fibers. This sequence ensures
coordinated atrial and ventricular contraction.
5. The QRS complex represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Correct Answer: B
Rationale: The QRS complex represents ventricular depolarization. Atrial depolarization is
represented by the P wave, while ventricular repolarization is represented by the T wave. The
QRS duration normally measures 0.06–0.10 seconds.
6. The T wave represents:
HCA Healthcare Telemetry ECG/EKG
Interpretation Exam Comprehensive Practice
Question Bank — 250 Advanced Multiple-Choice
Questions with Verified Answers and Detailed
Rationales
TITLE: HCA Healthcare Telemetry ECG/EKG Interpretation Competency Examination:
Comprehensive 250-Question Practice Bank Covering Sinus Rhythms, Atrial and Ventricular
Dysrhythmias, AV Blocks, Pacemaker Function, 12-Lead Interpretation, and Clinical
Management Aligned with 2026 AHA Guidelines
SECTION 1: CARDIAC ANATOMY AND ELECTROPHYSIOLOGY (Questions 1–20)
1. The sinoatrial (SA) node is located in which anatomical structure of the heart?
A) Interventricular septum
B) Right atrial wall near the superior vena cava
C) Left atrial appendage
D) Coronary sinus
Correct Answer: B
,2
Rationale: The SA node is located in the upper wall of the right atrium, near the opening of the
superior vena cava. It is the primary pacemaker of the heart, generating electrical impulses at a
rate of 60–100 beats per minute. The SA node's location is critical for understanding the origin
of normal sinus rhythms.
2. The normal intrinsic firing rate of the atrioventricular (AV) node is:
A) 60–100 beats per minute
B) 40–60 beats per minute
C) 20–40 beats per minute
D) 100–150 beats per minute
Correct Answer: B
Rationale: The AV node has an intrinsic firing rate of 40–60 beats per minute. It serves as the
secondary pacemaker when the SA node fails. The Purkinje fibers have the slowest intrinsic rate
of 20–40 beats per minute. Understanding these rates is essential for identifying escape
rhythms.
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3. The normal PR interval duration is:
A) 0.04–0.10 seconds
B) 0.12–0.20 seconds
C) 0.20–0.30 seconds
D) 0.30–0.40 seconds
Correct Answer: B
Rationale: The normal PR interval measures 0.12–0.20 seconds (3–5 small boxes on standard
ECG paper). It represents the time from the onset of atrial depolarization to the onset of
ventricular depolarization. Prolongation beyond 0.20 seconds indicates first-degree AV block.
4. Which of the following correctly describes the pathway of electrical conduction through
the heart?
A) AV node → SA node → Bundle of His → Purkinje fibers
B) SA node → AV node → Bundle of His → Bundle branches → Purkinje fibers
C) SA node → Bundle of His → AV node → Purkinje fibers
D) AV node → Bundle of His → SA node → Purkinje fibers
, 4
Correct Answer: B
Rationale: The correct conduction pathway is: SA node → internodal pathways → AV node →
Bundle of His → left and right bundle branches → Purkinje fibers. This sequence ensures
coordinated atrial and ventricular contraction.
5. The QRS complex represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Correct Answer: B
Rationale: The QRS complex represents ventricular depolarization. Atrial depolarization is
represented by the P wave, while ventricular repolarization is represented by the T wave. The
QRS duration normally measures 0.06–0.10 seconds.
6. The T wave represents:
