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Chapter 35: Dysrhythmias Lewis: Medical-Surgical Nursing, 10th Edition questions with correct answers(2025/2026)

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The nurse needs to quickly estimate the heart rate for a patient with a regular heart rhythm. Which method will be best to use? a. Count the number of large squares in the R-R interval and divide by 300. b. Print a 1-minute electrocardiogram (ECG) strip and count the number of QRS complexes. c. Use the 3-second markers to count the number of QRS complexes in 6 seconds and multiply by 10. d. Calculate the number of small squares between one QRS complex and the next and divide into 1500. CORRECT ANSWER ANS: C This is the quickest way to determine the ventricular rate for a patient with a regular rhythm. All the other methods are accurate, but take longer. DIF: Cognitive Level: Analyze (analysis) The nurse obtains a rhythm strip on a patient who has had a myocardial infarction and makes the following analysis: no visible P waves, PR interval not measurable, ventricular rate of 162, R-R interval regular, and QRS complex wide and distorted, and QRS duration of 0.18 second. The nurse interprets the patient's cardiac rhythm as a. atrial flutter. c. ventricular fibrillation. b. sinus tachycardia. d. ventricular tachycardia. CORRECT ANSWER ANS: D The absence of P waves, wide QRS, rate greater than 150 beats/min, and the regularity of the rhythm indicate ventricular tachycardia. Atrial flutter is usually regular, has a narrow QRS configuration, and has flutter waves present representing atrial activity. Sinus tachycardia has P waves. Ventricular fibrillation is irregular and does not have a consistent QRS duration. DIF: Cognitive Level: Apply (application)

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Chapter 35: Dysrhythmias Lewis: Medical-Surgical
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Chapter 35: Dysrhythmias Lewis: Medical-Surgical

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Heart Failure NCLEX Questions
1. 1. Which of the following patients are MOST at risk for developing heart
failure? Select-all-that-apply< >*
A. A 69 year old male with a history of alcohol abuse and is recovering from a
myocardial infarction.
B. A 55 year old female with a health history of asthma and hypoparathy-
roidism.
C. A 30 year old male with a history of endocarditis and has severe mitral
stenosis.
D. A 45 year old female with lung cancer stage 2.
E. A 58 year old female with uncontrolled hypertension and is being treated for
influenza< > The answers to this question are options< > A, C, E. These patients
are at most risk for heart failure. Remember risks factor for developing heart failure
include< > remember the mnemonic FAILURE< > Faulty heart valves ( Option C
mitral stenosis in this case), Arrhythmias, Infarction (Option A), Lineage,
Uncontrolled hypertension (Option E), Recreational drug usage, Evaders (Option
E with influenza)
2. 2. A patient is being discharged home after hospitalization of left ventricular
systolic dysfunction. As the nurse providing discharge teaching to the patient,
which statement is NOT a correct statement about this condition?*
A. "Signs and symptoms of this type of heart failure can include< >
dyspnea, persistent cough, difficulty breathing while lying down, and
weight gain."
B. "It is important to monitor your daily weights, fluid and salt intake."
C. "Left-sided heart failure can lead to right-sided heart failure, if left untreat-


,ed."
D. "This type of heart failure can build up pressure in the hepatic veins
and cause them to become congested with fluid which leads to peripheral
edema."< > Option D is the answer. This is a description of right-sided heart
failure NOT left ventricular systolic dysfunction. Left-sided systolic dysfunction is
where
the left side of the heart is unable to CONTRACT efficiently which causes blood to
back-up into the lungs...leading to pulmonary edema.
3. 3. Which of the following are NOT typical signs and symptoms of right-sided
heart failure? Select-all-that-apply< >*
A. Jugular venous distention
B. Persistent cough
C. Weight gain
D. Crackles
E. Nocturia

F. Orthopnea< > The answers are B, D, and F. Persistent cough, crackles (also
called rales), and orthopnea are signs and symptoms of LEFT-sided heart
failure...not right-sided heart failure.






, 4. 4. A patient is diagnosed with left-sided systolic dysfunction heart failure.
Which of the following are expected findings with this condition?*
A. Echocardiogram shows an ejection fraction of 38%.
B. Heart catheterization shows an ejection fraction of 65%.
C. Patient has frequent episodes of nocturnal paroxysmal dyspnea.
D. Options A and C are both expected findings with left-sided systolic dysfunc-
tion heart failure< > The answer is D. Both Options A and C are correct. Option B
is a finding expected in left-sided DIASTOLIC dysfunction heart failure because
the issue is with the ability of the ventricle to FILL properly...therefore a patient
usually has a normal ejection fraction. Remember a normal EF is >60% in a
healthy heart.
5. 5. True or False< > Patients with left-sided diastolic dysfunction heart
failure usually have a normal ejection fraction.*
True
False< > The answer is TRUE. Patient with left-sided DIASTOLIC dysfunction hear
failure normally have a normal ejection fraction. However, patients with left-sided
SYSTOLIC dysfunction heart failure usually do not because the heart is unable to
CONTRACT efficiently rather than fill properly as with diastolic dysfunction.
6. 6. A patient has a history of heart failure. Which of the following statements
by the patient indicates the patient may be experiencing heart failure exacer-
bation?*
A. "I've noticed that I've gain 6 lbs in one week."
B. "While I sleep I have to prop myself up with a pillow so I can breathe."
C. "I haven't noticed any swelling in my feet or hands lately."
D. Options B and C are correct.

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Chapter 35: Dysrhythmias Lewis: Medical-Surgical
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Chapter 35: Dysrhythmias Lewis: Medical-Surgical

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