What is the most common cause of coronary artery disease?

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.

Correct Answer: B

Rationale: Shortness of breath is a common symptom of deep vein thrombosis (DVT) due to the risk of a pulmonary embolism. DVT occurs when a blood clot forms in a deep vein, usually in the legs. If a portion of the clot breaks loose and travels to the lungs, it can cause a pulmonary embolism, leading to symptoms like shortness of breath. Chest pain is more commonly associated with conditions like a heart attack or pulmonary embolism itself. Coughing up blood is a symptom more indicative of conditions such as pulmonary embolism or lung cancer. Cyanosis, which is a bluish discoloration of the skin or mucous membranes due to poor oxygenation, can be seen in severe cases of pulmonary embolism but is not a typical symptom of DVT.

Correct Answer: B

Rationale: The correct answer is monitoring the patient's respiratory rate. When a patient receives intravenous morphine, the priority assessment is to monitor the respiratory rate due to the risk of respiratory depression associated with morphine. This assessment helps in detecting and managing any potential respiratory complications promptly. Assessing blood pressure, checking pain level, and monitoring oxygen saturation are important aspects of patient care but are not the priority when considering the specific risk of respiratory depression with intravenous morphine.

Correct Answer: C

Rationale: A stiff neck is a common sign of meningitis due to inflammation of the meninges. Meningitis typically presents with symptoms such as fever, severe headache, nausea, vomiting, sensitivity to light, and a stiff neck. Joint pain (Choice A) is not a typical symptom of meningitis and is more commonly associated with other conditions. While severe headache (Choice B) can be a symptom of meningitis, it is not as specific as a stiff neck. Coughing up blood (Choice D) is not a typical sign of meningitis and may indicate other respiratory or cardiovascular issues.

Correct Answer: A

Rationale: Hyperkalemia is a common complication in chronic kidney disease due to the kidneys' reduced ability to excrete potassium. As kidney function declines, potassium levels may increase, leading to hyperkalemia. Hypernatremia (increased sodium levels), hypocalcemia (low calcium levels), and hyperphosphatemia (elevated phosphate levels) are not typically associated with chronic kidney disease. Therefore, the correct answer is hyperkalemia.