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Which of the following is a key symptom of myocardial infarction (MI)?
- A. Chest pain.
- B. Shortness of breath.
- C. Nausea.
- D. Fatigue.
Correct Answer: A
Rationale: The correct answer is A: Chest pain. Chest pain is a hallmark symptom of myocardial infarction (MI) due to inadequate blood flow to the heart muscle. This pain can be severe, crushing, or squeezing, and may radiate to the left arm, jaw, or back. Shortness of breath (choice B), nausea (choice C), and fatigue (choice D) can accompany MI but are not as specific or characteristic as chest pain in diagnosing this condition. Therefore, chest pain is the primary symptom to recognize for suspected MI.
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Which of the following conditions is the most significant risk factor for the development of type 2 diabetes mellitus?
- A. Cigarette smoking.
- B. High-cholesterol diet.
- C. Obesity.
- D. Hypertension.
Correct Answer: C
Rationale: Obesity is the most significant risk factor for developing type 2 diabetes mellitus due to its role in insulin resistance. Excess body fat, especially around the abdomen, leads to increased production of inflammatory markers and hormones that can cause insulin resistance. While cigarette smoking, high-cholesterol diet, and hypertension can contribute to health issues, they are not as directly linked to the development of type 2 diabetes mellitus as obesity.
Which of the following is a key symptom of hypothyroidism?
- A. Weight loss.
- B. Heat intolerance.
- C. Cold intolerance.
- D. Increased appetite.
Correct Answer: C
Rationale: Cold intolerance is a key symptom of hypothyroidism because a decreased metabolic rate leads to a reduced ability to regulate body temperature. Weight loss (Choice A) is more commonly associated with hyperthyroidism, where the metabolic rate is increased. Heat intolerance (Choice B) is also more indicative of hyperthyroidism, where excess thyroid hormone leads to an increased sensitivity to heat. Increased appetite (Choice D) is not typically seen in hypothyroidism; instead, individuals with hypothyroidism may experience weight gain due to the slowed metabolism.
What is the most common cause of coronary artery disease?
- A. Atherosclerosis.
- B. Hyperlipidemia.
- C. Diabetes.
- D. Smoking.
Correct Answer: A
Rationale: The correct answer is Atherosclerosis. It is the primary cause of coronary artery disease, as it involves the buildup of plaque in the arteries, restricting blood flow to the heart. Hyperlipidemia (choice B) contributes to atherosclerosis by increasing cholesterol levels in the blood but is not the direct cause of coronary artery disease. Diabetes (choice C) can accelerate atherosclerosis due to high blood sugar levels, but it is not the most common cause. Smoking (choice D) is a significant risk factor for developing coronary artery disease but is not the primary cause.
After three days of persistent epigastric pain, a female client presents to the clinic. She has been taking oral antacids without relief. Her vital signs are heart rate 122 beats/minute, respirations 16 breaths/minute, oxygen saturation 96%, and blood pressure 116/70. The nurse obtains a 12-lead electrocardiogram (ECG). Which assessment finding is most critical?
- A. Irregular pulse rhythm
- B. Bile-colored emesis
- C. ST elevation in three leads
- D. Complaint of radiating jaw pain
Correct Answer: C
Rationale: ST elevation in three leads is a critical finding that suggests myocardial infarction, requiring immediate attention. This finding indicates ischemia or injury to the heart muscle. Choices A, B, and D are not as critical in this scenario. Irregular pulse rhythm may be concerning but does not indicate an immediate life-threatening condition like myocardial infarction. Bile-colored emesis and complaint of radiating jaw pain are relevant but not as indicative of a myocardial infarction as ST elevation in three leads.
The nurse is caring for a client who is postoperative for a femoral head fracture repair. Which intervention(s) should the nurse plan to administer for deep vein thrombosis prophylaxis?
- A. Pneumatic compression devices
- B. Incentive spirometry
- C. Assisted ambulation
- D. Calf-pump exercises
Correct Answer: A
Rationale: The correct intervention for deep vein thrombosis prophylaxis in a postoperative client with a femoral head fracture repair is the use of pneumatic compression devices. These devices help prevent stasis in the lower extremities by promoting venous return through intermittent compression. Incentive spirometry is used to prevent respiratory complications by promoting lung expansion and clearing secretions, not for DVT prophylaxis. Assisted ambulation and calf-pump exercises are beneficial for promoting circulation and preventing DVT, but pneumatic compression devices are more effective in this specific postoperative scenario.