- Which of the following is the most appropriate initial management for this patient's blood pressure?
Answer: Administer intravenous labetalol to lower mean arterial pressure by 10-20% in the first hour
This patient has hypertensive encephalopathy, a hypertensive emergency characterized by severe hypertension and signs of cerebral edema (confusion, papilledema). The goal is to carefully lower the blood pressure to prevent further end-organ damage without causing cerebral hypoperfusion. The recommended approach is to lower the mean arterial pressure (MAP) by no more than 25% over the first few hours (or 10-20% in the first hour). Intravenous labetalol is an appropriate first-line agent. Rapid normalization of blood pressure with hydralazine or sublingual nifedipine is dangerous and can lead to ischemic stroke. Oral medications are inappropriate for a true emergency.
- What is the most likely underlying cause of this patient's hypertension and acute kidney injury?
Answer: Atherosclerotic renal artery stenosis
The patient's presentation of new-onset, severe hypertension in an elderly individual with widespread atherosclerosis, an abdominal bruit, and a significant rise in creatinine after initiation of an ACE inhibitor is classic for atherosclerotic renal artery stenosis. In patients with significant bilateral stenosis (or stenosis in a solitary kidney), the glomerular filtration rate is dependent on angiotensin II-mediated efferent arteriole constriction. ACE inhibitors block this mechanism, leading to a precipitous drop in GFR and acute kidney injury. Fibromuscular dysplasia is a cause of RAS but typically presents in younger women.
- In addition to aspirin and a statin, which of the following is the most appropriate initial intervention for this patient's primary complaint?
Answer: A supervised exercise program
This patient has classic symptoms of intermittent claudication due to peripheral arterial disease (PAD), confirmed by the low ankle-brachial index. The cornerstone of initial management for claudication is a structured, supervised exercise program. This has been shown to improve walking distance and quality of life. Medical management with risk factor modification (smoking cessation), antiplatelet therapy (aspirin), and a statin is also crucial. Invasive interventions like angioplasty or surgical bypass are reserved for patients with limb-threatening ischemia or debilitating symptoms refractory to conservative management.
- After confirming the diagnosis with Doppler ultrasound, which of the following is the most appropriate immediate step in management?
Answer: Initiate an intravenous heparin infusion
This patient presents with acute limb ischemia, characterized by the '6 Ps' (pain, pallor, pulselessness, poikilothermia, paralysis, paresthesias). This is a vascular emergency. The most likely cause in this patient is an arterial embolism from her atrial fibrillation. The immediate management, while awaiting vascular surgery consultation for revascularization (e.g., thrombectomy or thrombolysis), is to start an intravenous heparin infusion. This prevents further propagation of the thrombus and thrombosis in the distal microvasculature. Delaying anticoagulation can worsen the ischemia.
- Which of the following antihypertensive medications would be the most beneficial addition for this patient?
Answer: Doxazosin
This patient has both hypertension and symptomatic benign prostatic hyperplasia. Alpha-1 adrenergic blockers, such as doxazosin, prazosin, and terazosin, are effective antihypertensive agents that also relax the smooth muscle in the bladder neck and prostate, thereby improving urinary symptoms associated with BPH. This makes them an excellent choice for patients with both conditions. The other options would help with blood pressure but would not provide any benefit for his BPH symptoms.
- This patient's condition is considered a hypertensive emergency. Which of the following medications should be specifically avoided in his initial management?
Answer: Labetalol
This patient is presenting with a hypertensive emergency complicated by an acute myocardial infarction, likely precipitated by cocaine use. While beta-blockers are a cornerstone of MI therapy, they should be used with extreme caution or avoided in the setting of acute cocaine intoxication. Unopposed alpha-adrenergic stimulation from cocaine can lead to paradoxical hypertension and worsening coronary vasoconstriction if a pure beta-blocker is given. Labetalol has both alpha- and beta-blocking properties, but pure beta-blockade is the concern. A calcium channel blocker like nicardipine and a vasodilator like nitroglycerin are preferred for blood pressure and ischemia control in this specific scenario. Aspirin is indicated for the MI.
- Which of the following is the most immediate therapeutic goal in managing this patient?
Answer: Rapid reduction of heart rate and systolic blood pressure
The clinical presentation is classic for an acute aortic dissection. The most critical initial step in medical management is to reduce aortic wall stress by decreasing heart rate and blood pressure. This limits the propagation of the dissection. The goal is to rapidly lower the heart rate to <60/min and the systolic blood pressure to 100-120 mmHg using intravenous beta-blockers (e.g., labetalol, esmolol) followed by a vasodilator (e.g., nitroprusside) if needed. Thrombolytics are contraindicated as they would be catastrophic. Pericardiocentesis is only for tamponade, and an IABP would worsen the dissection.
- A 66-year-old smoker with diabetes has nonhealing toe ulcer and rest pain; ABI 0.35, cool foot, weak pulses. What is the most appropriate next step in management?
Answer: Refer for urgent vascular revascularization evaluation
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of nonhealing toe ulcer, rest pain, ABI 0.35, cool foot, and weak pulses indicate critical limb ischemia in PAD. The correct answer, A, is justified because urgent vascular revascularization evaluation is needed to prevent tissue loss and amputation. In contrast, B is incorrect due to supervised walking being inappropriate for rest pain and severe ischemia. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for PAD, emphasizing the importance of context-specific decision-making, and practicing the identification of vascular disorders.
- A 64-year-old man with sudden tearing chest pain has BP 210/120; CT confirms type B aortic dissection without malperfusion. What is the most appropriate next step in management?
Answer: Start IV beta-blocker and titrate BP down
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of sudden tearing chest pain, BP 210/120, and type B aortic dissection without malperfusion indicate need for medical management. The correct answer, A, is justified because IV beta-blocker controls heart rate and BP to stabilize uncomplicated type B dissection per guidelines. In contrast, B is incorrect due to emergent surgery being reserved for complicated cases with malperfusion. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for aortic dissection, emphasizing the importance of context-specific decision-making, and practicing the identification of vascular emergencies.
- A 60-year-old man with HTN presents with sudden chest pain and neurologic deficits; BP 205/115, CXR widened mediastinum. Which diagnostic test should be performed next?
Answer: CT angiography of the chest immediately
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of sudden chest pain, neurologic deficits, BP 205/115, and widened mediastinum indicate aortic dissection with complications. The correct answer, A, is justified because CT angiography urgently confirms dissection and guides management in this emergency. In contrast, B is incorrect due to head CT alone missing the aortic pathology causing symptoms. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for aortic disorders, emphasizing the importance of context-specific decision-making, and practicing the identification of vascular emergencies.
- A 58-year-old woman with long-standing HTN, CKD, and smoking presents with severe headache and blurred vision; BP 240/130, papilledema. What is the most appropriate next step in management?
Answer: Give IV labetalol and admit to ICU
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of severe headache, blurred vision, BP 240/130, and papilledema indicate hypertensive emergency with end-organ damage. The correct answer, B, is justified because IV labetalol allows controlled BP reduction in an ICU setting to prevent further neurologic deterioration, aligning with guidelines for malignant hypertension. In contrast, A is incorrect due to using oral clonidine for discharge, which is inappropriate for acute end-organ involvement requiring inpatient monitoring. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for hypertensive crises, emphasizing the importance of context-specific decision-making, and practicing the identification of end-organ damage in hypertension.
- Which of the following is the most appropriate next step in management?
Answer: Reinstitute and adjust oral antihypertensive medications and arrange close follow-up
This patient has hypertensive urgency, which is defined as severe hypertension (systolic >180 mmHg or diastolic >120 mmHg) without evidence of acute end-organ damage. The goal is to lower the blood pressure gradually over 24 to 48 hours using oral agents. There is no need for hospitalization or IV medications, as rapid lowering of blood pressure can cause hypoperfusion. The best approach is to assess adherence, reinstitute or add oral antihypertensive medications, and ensure close follow-up within a few days. Sublingual nifedipine is no longer recommended due to the risk of precipitous and unpredictable blood pressure drops.
- A 61-year-old woman with HTN presents with sudden tearing chest pain; BP 195/105, widened mediastinum on CXR. What is the most appropriate next step in management?
Answer: Start IV beta-blocker to lower shear stress
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of sudden tearing chest pain, BP 195/105, and widened mediastinum on CXR indicate aortic dissection. The correct answer, A, is justified because IV beta-blocker reduces heart rate and shear stress, which is critical before vasodilators in dissection management. In contrast, B is incorrect due to thrombolysis being contraindicated and potentially harmful in dissection mimicking PE. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for aortic dissection, emphasizing the importance of context-specific decision-making, and practicing the identification of vascular emergencies.
- Which of the following is the most appropriate next step to establish the diagnosis?
Answer: Plasma aldosterone concentration to plasma renin activity ratio
This patient presents with resistant hypertension and spontaneous hypokalemia, which is highly suggestive of primary aldosteronism. The most appropriate initial screening test for primary aldosteronism is the plasma aldosterone concentration to plasma renin activity ratio. A high aldosterone level in the setting of suppressed renin activity is diagnostic. After screening, confirmatory testing and imaging are typically pursued.
- According to USPSTF guidelines, which of the following is the most appropriate screening recommendation for this patient?
Answer: One-time screening with abdominal ultrasonography
The U.S. Preventive Services Task Force (USPSTF) recommends a one-time screening for abdominal aortic aneurysm (AAA) with ultrasonography in men aged 65 to 75 years who have ever smoked. This patient fits the criteria perfectly, being a 66-year-old man with a significant smoking history. The family history further increases his risk. CT angiography is not a screening tool due to cost and radiation exposure. Annual screening is not recommended unless a small aneurysm is found. No screening would be inappropriate given his risk factors.
- Which of the following is the most appropriate non-invasive test to confirm the diagnosis of peripheral arterial disease?
Answer: Ankle-brachial index measurement
The patient's symptoms are consistent with intermittent claudication due to peripheral arterial disease (PAD), specifically aortoiliac disease given the buttock and thigh location. The ankle-brachial index (ABI) is the best initial, non-invasive test to confirm the diagnosis of PAD. It is a simple, inexpensive test that compares the systolic blood pressure at the ankle to the systolic blood pressure in the arm. An ABI of ≤0.90 is diagnostic of PAD. Duplex ultrasound and MRA are more detailed imaging studies used for anatomical localization and planning interventions, but they are not the initial diagnostic test.
- Which of the following is the most appropriate initial pharmacologic therapy for this patient?
Answer: Hydrochlorothiazide
For initial monotherapy of uncomplicated hypertension in African American patients, current guidelines recommend either a thiazide-type diuretic or a long-acting dihydropyridine calcium channel blocker as first-line therapy. Both hydrochlorothiazide and amlodipine would be appropriate choices. ACE inhibitors and ARBs are generally less effective as monotherapy in this population. Beta-blockers are not considered first-line agents unless there is a specific indication.
- A 71-year-old man with HTN and CAD develops sudden severe back pain; BP 200/115, unequal arm pressures, new diastolic murmur. Which diagnostic test should be performed next?
Answer: CT angiography of chest and abdomen
This question tests knowledge of hypertension and vascular disorders relevant to USMLE Step 2 CK. Hypertension management involves accurate diagnosis, assessment of severity, and implementation of appropriate treatment strategies. In this scenario, the patient's presentation of sudden severe back pain, BP 200/115, unequal arm pressures, and new diastolic murmur indicate aortic dissection. The correct answer, A, is justified because CT angiography of the chest and abdomen confirms the diagnosis and extent of dissection in this vascular emergency. In contrast, B is incorrect due to MRI brain focusing on unrelated neurologic issues without addressing the aortic pathology. Effective teaching strategies include reinforcing the understanding of evidence-based guidelines for aortic disorders, emphasizing the importance of context-specific decision-making, and practicing the identification of vascular emergencies.
- Which of the following is the most appropriate management for this finding?
Answer: Ultrasound surveillance every 6-12 months
The management of asymptomatic abdominal aortic aneurysms (AAAs) is based on their size. Elective repair (either open or endovascular) is generally recommended when the aneurysm diameter reaches 5.5 cm in men, or if it is rapidly expanding (>0.5 cm in 6 months). For smaller aneurysms, such as the 4.6 cm one in this patient, the risk of rupture is low and is outweighed by the risks of surgery. Therefore, the standard of care is surveillance with serial imaging (typically ultrasound) every 6-12 months to monitor for expansion. Anticoagulation is not indicated and does not prevent aneurysm growth.
- Which of the following is the most appropriate laboratory test to investigate the cause of her hypertension?
Answer: Plasma free metanephrines
The patient's classic triad of episodic headache, palpitations, and diaphoresis (sweating) in the setting of paroxysmal hypertension is highly suggestive of a pheochromocytoma. The most sensitive and specific biochemical test for diagnosing pheochromocytoma is the measurement of plasma free metanephrines or 24-hour urinary fractionated metanephrines. The other options test for different causes of secondary hypertension (thyrotoxicosis, primary aldosteronism, renal artery stenosis) that are less consistent with this specific constellation of symptoms.
