You notice a patient has a strong pulse and then a weak pulse. This pattern continues. Which of the following is likely?

Correct Answer: D

Rationale: The scenario described with a strong pulse followed by a weak pulse is characteristic of pulsus paradoxus, a finding often associated with cardiac tamponade. Cardiac tamponade is a medical emergency where there is an accumulation of fluid (such as blood) in the pericardial sac that exerts pressure on the heart, limiting its ability to pump effectively. As a result, patients may exhibit this pulsus paradoxus, where the pulse strength varies with respiration. The other conditions listed (emphysema, asthma exacerbation, severe left heart failure) are not typically associated with this specific pulsatile pattern.

Correct Answer: B

Rationale: The description of dark, granular material resembling coffee grounds in the vomitus suggests upper gastrointestinal bleeding. One common cause of upper GI bleeding is a peptic ulcer, which can present with symptoms such as vomiting blood or coffee ground material. Peptic ulcers can develop in the stomach or the upper part of the small intestine (duodenum). Risk factors for peptic ulcers include infection with Helicobacter pylori bacteria, the use of nonsteroidal anti-inflammatory drugs (NSAIDs), smoking, and alcohol consumption. Prompt evaluation and management are necessary in cases of upper GI bleeding to address the underlying cause and prevent complications.

Correct Answer: D

Rationale: The presence of a palpable pulsatile abdominal mass in a patient like Mr. Martin, who is a smoker and at risk for vascular diseases, is concerning for an abdominal aortic aneurysm (AAA). Immediate referral to a vascular surgeon is essential for further evaluation and management. AAA can be a life-threatening condition if left untreated, as it can lead to rupture and severe internal bleeding. Therefore, prompt specialist evaluation and monitoring are crucial in such cases. Waiting for 3 or 6 months for reevaluation could potentially lead to a delayed diagnosis and increase the risk of complications. Abdominal ultrasound is typically the diagnostic test of choice to confirm the presence and size of the aneurysm.

Correct Answer: C

Rationale: Pain in the calf is a common symptom of atherosclerosis in the lower extremities, also known as peripheral artery disease (PAD). Atherosclerosis is the buildup of plaque in the arteries, leading to reduced blood flow. The calf pain associated with PAD is often described as cramping, aching, or fatigue that occurs during walking and is relieved with rest. This is called intermittent claudication. Thigh, knee, and ankle pain could have other causes, but calf pain specifically raises concerns for atherosclerosis in the lower extremities.

Correct Answer: C

Rationale: Venous insufficiency is the most likely etiology for the painful ulcerative lesion near the medial malleolus with accompanying hyperpigmentation. Venous insufficiency can lead to the development of venous stasis ulcers, which typically occur on the lower extremities, especially around the ankle area. These ulcers are often painful and associated with swelling, hyperpigmentation, and a weeping or moist wound bed. The location of the ulcer near the medial malleolus is also characteristic of venous insufficiency-related ulcers. Arterial insufficiency would typically present with different clinical findings, such as a pale, cool extremity, decreased pulses, and hair loss. Neuropathic ulcers are usually painless due to the loss of sensation, and trauma would have a different appearance than the described findings.