Which of the following conditions is most commonly associated with a high risk of stroke?

Correct Answer: A

Rationale: Hypertension is the correct answer. Hypertension, also known as high blood pressure, is a major risk factor for stroke because it puts increased pressure on blood vessels in the brain, making them more prone to damage and increasing the likelihood of a stroke. While diabetes, obesity, and smoking are also risk factors for stroke, hypertension is the most commonly associated condition with a high risk of stroke due to its direct impact on the blood vessels.

Correct Answer: D

Rationale: In a patient with cirrhosis, a low platelet count is the most concerning lab result. Thrombocytopenia, or low platelet count, is common in cirrhosis due to impaired platelet production in the liver. It significantly increases the risk of bleeding and can lead to serious complications such as hemorrhage. Elevated liver enzymes (Choice A) are expected in cirrhosis but may not directly indicate the severity of the disease. Low albumin levels (Choice B) are common in cirrhosis and can contribute to fluid retention but do not pose an immediate risk of bleeding. Elevated bilirubin levels (Choice C) are also expected in cirrhosis and typically indicate impaired liver function but do not directly increase the risk of bleeding as much as a low platelet count.

Correct Answer: A

Rationale: Corrected Choice A: Right lower quadrant pain is a classic and key symptom of appendicitis. Pain in the right lower quadrant is typically the initial symptom and is a result of inflammation and irritation of the appendix. This pain can start around the umbilicus and then migrate to the right lower quadrant. It is important to note that appendicitis rarely presents with pain in the left lower quadrant or generalized abdominal pain. Rebound tenderness, indicated in Choice D, is a sign of peritoneal irritation and is associated with appendicitis, but it is not as characteristic as the right lower quadrant pain in the initial presentation of appendicitis.

Correct Answer: B

Rationale: The primary goal of treating pneumonia is to eliminate the infection. Antibiotics are commonly used to target the specific pathogen causing pneumonia. While reducing inflammation and preventing complications are important aspects of treatment, the key focus initially is on eradicating the infectious agent to improve the patient's condition and prevent further spread of the infection.

Correct Answer: B

Rationale: The primary purpose of administering anticoagulants to a patient with atrial fibrillation is to prevent clot formation. Patients with atrial fibrillation are at an increased risk of forming blood clots in the heart, which can lead to stroke if they travel to the brain. Anticoagulants help to reduce this risk by inhibiting the clotting process. Therefore, choices A, C, and D are incorrect because anticoagulants do not primarily aim to reduce blood pressure, prevent arrhythmias, or reduce inflammation in patients with atrial fibrillation.