Nokea
What test measures the electrical activity of the heart over a 24- or 48-hour period?
- A. Holter monitor
- B. Electrocardiogram
- C. Stress test
- D. Chest X-ray
Correct Answer: A
Rationale: The correct answer is A: Holter monitor. This device records the electrical activity of the heart over an extended period, typically 24-48 hours, providing a more comprehensive assessment compared to a standard ECG (choice B). A stress test (choice C) evaluates the heart's response to physical exertion, not prolonged monitoring. A chest X-ray (choice D) is used to visualize the heart and lungs, but does not measure electrical activity. Therefore, the Holter monitor is the most appropriate test for continuous monitoring of heart activity over an extended period.
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Which of the following is a rare genetic disorder that affects the lungs, liver, and skin, causing the buildup of a specific protein that damages organs?
- A. Alpha-1 antitrypsin deficiency
- B. Cystic fibrosis
- C. Wegener's granulomatosis
- D. Marfan syndrome
Correct Answer: A
Rationale: Alpha-1 antitrypsin deficiency is the correct answer. This disorder affects the lungs, liver, and skin due to the buildup of a specific protein (alpha-1 antitrypsin) that damages organs. This deficiency can lead to lung and liver diseases. Cystic fibrosis primarily affects the lungs and digestive system, not the liver and skin. Wegener's granulomatosis is a condition that affects the blood vessels, lungs, and kidneys, not the liver. Marfan syndrome is a connective tissue disorder that affects the heart, blood vessels, bones, and eyes, not the lungs, liver, and skin.
The client is on furosemide (Lasix) and has a potassium level of 2.9 mEq/L. What is the nurse's priority action?
- A. Administer potassium supplements.
- B. Hold the furosemide and notify the healthcare provider.
- C. Continue the current dose of furosemide.
- D. Decrease the dose of furosemide.
Correct Answer: A
Rationale: Rationale:
1. Furosemide is a loop diuretic that can cause potassium loss.
2. Potassium level of 2.9 mEq/L indicates hypokalemia, which can lead to serious complications.
3. Priority is to address low potassium levels to prevent adverse effects like cardiac arrhythmias.
4. Administering potassium supplements helps to normalize potassium levels promptly.
Summary:
B: Holding furosemide without addressing low potassium can worsen the imbalance.
C: Continuing the current dose without addressing low potassium can lead to further depletion.
D: Decreasing furosemide dose before addressing low potassium can delay correcting the imbalance.
A client with dysrhythmia has decreased cardiac output. Which of the following nursing interventions is essential to maintain adequate cardiac output?
- A. Encourage mild exercises
- B. Place the client in supine position
- C. Ensure a client IV access
- D. Provide supplemental oxygen
Correct Answer: D
Rationale: Supplemental oxygen improves oxygen delivery to tissues, supporting cardiac output in clients with dysrhythmias.
What is the procedure where a catheter is used to open a blocked or narrowed coronary artery, often involving the placement of a stent?
- A. Angioplasty
- B. Valve replacement
- C. Stent placement
- D. Coronary artery bypass graft (CABG)
Correct Answer: A
Rationale: The correct answer is A: Angioplasty. During angioplasty, a catheter with a balloon at its tip is used to open a blocked or narrowed coronary artery. The balloon is inflated to widen the artery and improve blood flow. Often, a stent is placed during the procedure to help keep the artery open. Option B, valve replacement, is incorrect as it involves replacing a faulty heart valve, not opening a blocked coronary artery. Option C, stent placement, is close but not specific to the procedure of using a catheter and balloon. Option D, CABG, is a surgical procedure where arteries or veins are used to bypass blocked coronary arteries, not using a catheter.
Which type of medication is used to reduce the workload on the heart by slowing down the heart rate and lowering blood pressure?
- A. Beta-blocker
- B. ACE inhibitor
- C. Calcium channel blocker
- D. Diuretic
Correct Answer: A
Rationale: The correct answer is A: Beta-blocker. Beta-blockers reduce the workload on the heart by blocking the action of adrenaline on beta receptors, slowing down heart rate and lowering blood pressure. This helps to decrease the heart's oxygen demand and improve its efficiency. ACE inhibitors (B) work by dilating blood vessels, Calcium channel blockers (C) block calcium entry into cells to relax blood vessels, and Diuretics (D) reduce blood volume by increasing urine output, but they do not specifically target reducing the workload on the heart.