SHARP EKG TEST BANK & STUDY GUIDE
ECG INTERPRETATION | CARDIOLOGY | NURSING
EXAM PREP QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
A patient’s ECG shows an irregularly irregular rhythm with no discernible P waves
and a ventricular rate of 138 bpm. What is the most likely interpretation?
A. Atrial flutter
B. Ventricular tachycardia
C. Atrial fibrillation
D. Sinus tachycardia
Answer: C
Rationale: Atrial fibrillation is characterized by an irregularly irregular rhythm,
absence of distinct P waves, and variable ventricular response.
Question 2
Which ECG finding is most consistent with acute myocardial infarction?
A. Peaked T waves in all leads
B. ST-segment elevation in contiguous leads
C. Shortened PR interval
D. Wide QRS complex only
,Answer: B
Rationale: ST-segment elevation in contiguous leads is a hallmark of acute
STEMI.
Question 3
A patient presents with a heart rate of 38 bpm and a regular rhythm. ECG shows P
waves and QRS complexes that are independent of each other. What rhythm is
this?
A. First-degree AV block
B. Second-degree AV block type I
C. Third-degree heart block
D. Sinus bradycardia
Answer: C
Rationale: Complete heart block shows AV dissociation where P waves and QRS
complexes occur independently.
Question 4
Which electrolyte imbalance is most associated with peaked T waves on ECG?
A. Hypokalemia
B. Hyperkalemia
C. Hypocalcemia
D. Hypernatremia
Answer: B
Rationale: Hyperkalemia classically produces tall, peaked T waves and widened
QRS complexes.
,Question 5
A patient has a regular rhythm at 180 bpm with narrow QRS complexes and no
visible P waves. What is the most likely rhythm?
A. Ventricular fibrillation
B. Supraventricular tachycardia
C. Atrial fibrillation
D. Ventricular tachycardia
Answer: B
Rationale: SVT typically presents as a regular narrow-complex tachycardia with
absent or hidden P waves.
Question 6
Which ECG pattern is most characteristic of ventricular fibrillation?
A. Regular sawtooth waves
B. Chaotic irregular waveform without identifiable complexes
C. Wide QRS with P waves
D. ST depression
Answer: B
Rationale: Ventricular fibrillation shows chaotic electrical activity with no
organized QRS complexes.
Question 7
A prolonged PR interval greater than 0.20 seconds indicates:
A. First-degree AV block
B. Second-degree AV block
C. Bundle branch block
D. Atrial fibrillation
, Answer: A
Rationale: First-degree AV block is defined by a consistently prolonged PR
interval.
Question 8
Which rhythm is most life-threatening and requires immediate defibrillation?
A. Asystole
B. Pulseless electrical activity
C. Ventricular fibrillation
D. Sinus bradycardia
Answer: C
Rationale: Ventricular fibrillation is a shockable rhythm requiring immediate
defibrillation.
Question 9
A patient has progressive lengthening of the PR interval followed by a dropped
QRS complex. What rhythm is this?
A. Mobitz type I (Wenckebach)
B. Mobitz type II
C. Third-degree heart block
D. Atrial flutter
Answer: A
Rationale: Wenckebach shows progressive PR prolongation before a dropped
beat.
Question 10
Which ECG finding is associated with hypokalemia?
A. Peaked T waves
B. U waves and flattened T waves
ECG INTERPRETATION | CARDIOLOGY | NURSING
EXAM PREP QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
A patient’s ECG shows an irregularly irregular rhythm with no discernible P waves
and a ventricular rate of 138 bpm. What is the most likely interpretation?
A. Atrial flutter
B. Ventricular tachycardia
C. Atrial fibrillation
D. Sinus tachycardia
Answer: C
Rationale: Atrial fibrillation is characterized by an irregularly irregular rhythm,
absence of distinct P waves, and variable ventricular response.
Question 2
Which ECG finding is most consistent with acute myocardial infarction?
A. Peaked T waves in all leads
B. ST-segment elevation in contiguous leads
C. Shortened PR interval
D. Wide QRS complex only
,Answer: B
Rationale: ST-segment elevation in contiguous leads is a hallmark of acute
STEMI.
Question 3
A patient presents with a heart rate of 38 bpm and a regular rhythm. ECG shows P
waves and QRS complexes that are independent of each other. What rhythm is
this?
A. First-degree AV block
B. Second-degree AV block type I
C. Third-degree heart block
D. Sinus bradycardia
Answer: C
Rationale: Complete heart block shows AV dissociation where P waves and QRS
complexes occur independently.
Question 4
Which electrolyte imbalance is most associated with peaked T waves on ECG?
A. Hypokalemia
B. Hyperkalemia
C. Hypocalcemia
D. Hypernatremia
Answer: B
Rationale: Hyperkalemia classically produces tall, peaked T waves and widened
QRS complexes.
,Question 5
A patient has a regular rhythm at 180 bpm with narrow QRS complexes and no
visible P waves. What is the most likely rhythm?
A. Ventricular fibrillation
B. Supraventricular tachycardia
C. Atrial fibrillation
D. Ventricular tachycardia
Answer: B
Rationale: SVT typically presents as a regular narrow-complex tachycardia with
absent or hidden P waves.
Question 6
Which ECG pattern is most characteristic of ventricular fibrillation?
A. Regular sawtooth waves
B. Chaotic irregular waveform without identifiable complexes
C. Wide QRS with P waves
D. ST depression
Answer: B
Rationale: Ventricular fibrillation shows chaotic electrical activity with no
organized QRS complexes.
Question 7
A prolonged PR interval greater than 0.20 seconds indicates:
A. First-degree AV block
B. Second-degree AV block
C. Bundle branch block
D. Atrial fibrillation
, Answer: A
Rationale: First-degree AV block is defined by a consistently prolonged PR
interval.
Question 8
Which rhythm is most life-threatening and requires immediate defibrillation?
A. Asystole
B. Pulseless electrical activity
C. Ventricular fibrillation
D. Sinus bradycardia
Answer: C
Rationale: Ventricular fibrillation is a shockable rhythm requiring immediate
defibrillation.
Question 9
A patient has progressive lengthening of the PR interval followed by a dropped
QRS complex. What rhythm is this?
A. Mobitz type I (Wenckebach)
B. Mobitz type II
C. Third-degree heart block
D. Atrial flutter
Answer: A
Rationale: Wenckebach shows progressive PR prolongation before a dropped
beat.
Question 10
Which ECG finding is associated with hypokalemia?
A. Peaked T waves
B. U waves and flattened T waves
