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What is the procedure to remove a sample of tissue from the lung for examination under a microscope?
- A. Lung biopsy
- B. Bronchoscopy
- C. Thoracentesis
- D. Lobectomy
Correct Answer: A
Rationale: The correct answer is A: Lung biopsy. This procedure involves removing a sample of tissue from the lung for examination under a microscope. It is typically performed using a needle or during a surgical procedure. Bronchoscopy (B) involves examining the airways with a camera and is not used for tissue sampling. Thoracentesis (C) is the removal of fluid from the pleural space, not tissue from the lung. Lobectomy (D) is the surgical removal of a lobe of the lung, not specifically for obtaining a tissue sample.
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What condition involves the heart's electrical system malfunctioning, causing very fast heartbeats originating from the ventricles?
- A. Ventricular tachycardia
- B. Atrial fibrillation
- C. Supraventricular tachycardia
- D. Bradycardia
Correct Answer: A
Rationale: The correct answer is A: Ventricular tachycardia. Ventricular tachycardia is characterized by rapid heartbeats originating from the ventricles, resulting in an abnormal heart rhythm. This condition can be life-threatening if not promptly treated. Atrial fibrillation involves rapid, irregular heartbeats originating from the atria, not the ventricles (B). Supraventricular tachycardia also originates above the ventricles and is not specific to ventricular malfunction (C). Bradycardia, on the other hand, is a condition characterized by an abnormally slow heart rate, which is the opposite of the fast heartbeats seen in ventricular tachycardia (D).
Which heart chamber receives venous blood returning to the heart via the superior and inferior vena cava?
- A. Right atrium
- B. Left atrium
- C. Right ventricle
- D. Left ventricle
Correct Answer: A
Rationale: The correct answer is A: Right atrium. The right atrium receives venous blood returning to the heart via the superior and inferior vena cava. Blood from the body enters the right atrium through the vena cavae, then flows into the right ventricle and eventually gets pumped to the lungs for oxygenation. Choices B, C, and D are incorrect because the left atrium receives oxygenated blood from the lungs, the right ventricle pumps blood to the lungs, and the left ventricle pumps oxygenated blood to the rest of the body.
Which measure would be most useful in evaluating a client's compensation in chronic congestive heart failure?
- A. Weekly digoxin blood level assessment
- B. Daily weight assessment
- C. Hourly urinary output
- D. Monthly activity level assessment
Correct Answer: B
Rationale: Daily weight reflects fluid status.
In cases of myocardial infarction leading to shock, which medication is appropriate to counteract shock?
- A. Atropine
- B. Dopamine
- C. Digoxin
- D. Adenosine
Correct Answer: B
Rationale: The correct answer is B: Dopamine. In myocardial infarction leading to shock, dopamine is appropriate due to its positive inotropic effects, increasing cardiac output and blood pressure. Atropine is not indicated for shock in this context. Digoxin may be contraindicated in acute myocardial infarction. Adenosine is not used in managing shock.
In an assessment for intermittent claudication, the cardiac-vascular nurse assesses for leg pain and cramping with exertion, then asks the patient:
- A. Does shortness of breath accompany the leg pain?'
- B. Does this same type of pain occur without activity?'
- C. Is the leg pain relieved by rest?'
- D. Is the leg pain relieved with elevation?'
Correct Answer: C
Rationale: Intermittent claudication pain typically resolves with rest.