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HOAG ECG Exam UPDATED ACTUAL Exam Questions and CORRECT Answers

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This comprehensive ECG practice exam is designed to help healthcare professionals prepare for hospital telemetry and ECG competency assessments. It includes original multiple-choice questions with detailed answer explanations covering cardiac anatomy, electrophysiology, rhythm interpretation, heart blocks, myocardial infarction recognition, electrolyte abnormalities, pacemakers, and ACLS-related rhythm management. The material is intended for educational purposes and reflects common concepts tested in clinical ECG competency exams without reproducing proprietary examination content.

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HOAG ECG EXAM UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS


Question 1
Which cardiac structure normally initiates the electrical impulse?

A. AV node

B. Bundle of His

C. SA node

D. Purkinje fibers

Answer: C

Rationale: The sinoatrial (SA) node is the heart's natural pacemaker,
normally firing at 60–100 bpm.



Question 2
A normal PR interval is:

A. 0.04–0.08 sec

B. 0.12–0.20 sec

C. 0.24–0.30 sec

D. Greater than 0.30 sec

Answer: B

Rationale: Normal AV conduction produces a PR interval between 0.12
and 0.20 seconds.

,Question 3
The normal QRS duration is:

A. Less than 0.12 sec

B. Greater than 0.20 sec

C. 0.20–0.30 sec

D. Exactly 0.16 sec

Answer: A



Question 4
Which rhythm is considered the normal cardiac rhythm?

A. Atrial flutter

B. Sinus rhythm

C. Ventricular tachycardia

D. Junctional rhythm

Answer: B



Question 5
A patient has:

• Regular rhythm

• Rate 75 bpm

• Upright P wave before every QRS

• Normal PR interval

The rhythm is:

, A. Sinus rhythm

B. Sinus tachycardia

C. Junctional rhythm

D. Atrial flutter

Answer: A



Question 6
Which electrolyte abnormality commonly produces tall peaked T waves?

A. Hypokalemia

B. Hyperkalemia

C. Hypocalcemia

D. Hyponatremia

Answer: B



Question 7
Sinus bradycardia is defined as:

A. HR <60 bpm

B. HR <50 bpm

C. HR <40 bpm

D. HR <30 bpm

Answer: A



Question 8

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