1. A 58-year-old male patient presents with a three-day history of sudden-onset, severe abdominal pain. Which of the following is the most appropriate initial diagnostic test? A. Complete blood count (CBC) B. Abdominal ultrasound C. Electrocardiogram (ECG) D. Urinalysis Answer: B. Abdominal ultrasound Rationale: An abdominal ultrasound is a non-invasive, immediate test that can help identify gallstones, kidney stones, or other causes of acute abdominal pain. 2. During a cardiovascular assessment, you notice a patient has an irregular pulse. Which of the following actions is most appropriate? A. Prescribe anticoagulation therapy immediately. B. Perform a 12-lead ECG. C. Start beta-blocker therapy. D. Schedule a stress test. Answer: B. Perform a 12-lead ECG. Rationale: An ECG is essential to diagnose the type of arrhythmia and guide further treatment. 3. A patient complains of fatigue, weight gain, and cold