COMSAE Phase 3 Form CSA 110 Advanced
Clinical Synthesis Exam Practice Questions &
[Verified Answers], Plus Explained
Rationales|2026 Latest Update| Instant
Download PDF
1. A 67-year-old man presents with progressive dyspnea, orthopnea,
and bilateral lower-extremity edema. Echocardiography reveals
an ejection fraction of 28%. He is currently taking lisinopril and
furosemide. Which medication addition has been shown to
reduce mortality in heart failure with reduced ejection fraction?
A. Verapamil
B. Hydrochlorothiazide
C. Digoxin
D. Spironolactone
Answer: D. Spironolactone
Rationale: Aldosterone antagonists such as spironolactone reduce
mortality in patients with symptomatic HFrEF and EF ≤35%. Digoxin
improves symptoms but does not reduce mortality. Verapamil may
worsen systolic heart failure. Hydrochlorothiazide offers symptomatic
blood pressure control but no mortality benefit.
2. A 58-year-old woman develops sudden right-sided weakness and
aphasia 45 minutes before arrival. CT head reveals no
hemorrhage. Blood pressure is 170/95 mmHg. Which is the most
appropriate next step?
A. Aspirin administration immediately
B. Intravenous alteplase
,C. Heparin infusion
D. Carotid endarterectomy
Answer: B. Intravenous alteplase
Rationale: The patient presents within the thrombolytic window for
acute ischemic stroke. Blood pressure is below the threshold requiring
treatment before thrombolysis. Alteplase significantly improves
neurologic outcomes when administered appropriately.
3. A 42-year-old woman presents with episodic headaches,
diaphoresis, and palpitations. Blood pressure is 220/120 mmHg
during episodes. Laboratory studies reveal elevated plasma
metanephrines. Which tumor is most likely responsible?
A. Adrenal cortical adenoma
B. Pheochromocytoma
C. Aldosteronoma
D. Renal oncocytoma
Answer: B. Pheochromocytoma
Rationale: Pheochromocytomas arise from chromaffin cells and
secrete catecholamines, producing episodic hypertension, headaches,
sweating, and palpitations. Elevated plasma metanephrines are
highly sensitive diagnostic markers.
4. A 24-year-old woman presents with fatigue and pallor.
Hemoglobin is 8.2 g/dL. MCV is 68 fL. Ferritin is markedly
decreased. Which laboratory finding is also expected?
A. Increased transferrin saturation
B. Decreased total iron-binding capacity
C. Increased total iron-binding capacity
D. Elevated vitamin B12
,Answer: C. Increased total iron-binding capacity
Rationale: Iron deficiency anemia causes low ferritin, low serum iron,
and increased TIBC due to compensatory transferrin production.
Transferrin saturation is decreased rather than increased.
5. A hospitalized patient develops fever and hypotension. Blood
cultures reveal gram-negative rods. Which mediator is primarily
responsible for septic shock-associated vasodilation?
A. Histamine
B. Nitric oxide
C. Dopamine
D. Endothelin
Answer: B. Nitric oxide
Rationale: Endotoxin-induced cytokine release stimulates inducible
nitric oxide synthase, resulting in profound vasodilation and
distributive shock characteristic of septic shock.
6. A 70-year-old smoker presents with hematuria. Cystoscopy
reveals a bladder mass. Which is the strongest risk factor for
transitional cell carcinoma of the bladder?
A. Hypercalcemia
B. Cigarette smoking
C. Hepatitis C infection
D. Obesity
Answer: B. Cigarette smoking
Rationale: Smoking is the most significant risk factor for urothelial
carcinoma. Aromatic amines in tobacco smoke are concentrated in
urine and damage bladder epithelium.
, 7. A patient with diabetic ketoacidosis is started on insulin therapy.
Which electrolyte abnormality commonly develops during
treatment?
A. Hypercalcemia
B. Hypernatremia
C. Hypokalemia
D. Hypermagnesemia
Answer: C. Hypokalemia
Rationale: Insulin drives potassium intracellularly. Although serum
potassium may initially appear elevated, total body potassium is
depleted and treatment can rapidly precipitate hypokalemia.
8. A 60-year-old man reports chest pain during exertion that
resolves with rest. Coronary angiography reveals a 70% stenosis of
the left anterior descending artery. What is the pathophysiologic
basis of stable angina?
A. Complete thrombotic occlusion
B. Coronary vasospasm only
C. Fixed atherosclerotic narrowing
D. Myocarditis
Answer: C. Fixed atherosclerotic narrowing
Rationale: Stable angina occurs when fixed atherosclerotic lesions
limit blood flow during increased oxygen demand. Symptoms
predictably occur with exertion and improve with rest.
9. A 35-year-old woman presents with weight loss, heat intolerance,
and tremor. Laboratory testing reveals suppressed TSH and
elevated free T4. Which physical finding is most specific for
Graves disease?
Clinical Synthesis Exam Practice Questions &
[Verified Answers], Plus Explained
Rationales|2026 Latest Update| Instant
Download PDF
1. A 67-year-old man presents with progressive dyspnea, orthopnea,
and bilateral lower-extremity edema. Echocardiography reveals
an ejection fraction of 28%. He is currently taking lisinopril and
furosemide. Which medication addition has been shown to
reduce mortality in heart failure with reduced ejection fraction?
A. Verapamil
B. Hydrochlorothiazide
C. Digoxin
D. Spironolactone
Answer: D. Spironolactone
Rationale: Aldosterone antagonists such as spironolactone reduce
mortality in patients with symptomatic HFrEF and EF ≤35%. Digoxin
improves symptoms but does not reduce mortality. Verapamil may
worsen systolic heart failure. Hydrochlorothiazide offers symptomatic
blood pressure control but no mortality benefit.
2. A 58-year-old woman develops sudden right-sided weakness and
aphasia 45 minutes before arrival. CT head reveals no
hemorrhage. Blood pressure is 170/95 mmHg. Which is the most
appropriate next step?
A. Aspirin administration immediately
B. Intravenous alteplase
,C. Heparin infusion
D. Carotid endarterectomy
Answer: B. Intravenous alteplase
Rationale: The patient presents within the thrombolytic window for
acute ischemic stroke. Blood pressure is below the threshold requiring
treatment before thrombolysis. Alteplase significantly improves
neurologic outcomes when administered appropriately.
3. A 42-year-old woman presents with episodic headaches,
diaphoresis, and palpitations. Blood pressure is 220/120 mmHg
during episodes. Laboratory studies reveal elevated plasma
metanephrines. Which tumor is most likely responsible?
A. Adrenal cortical adenoma
B. Pheochromocytoma
C. Aldosteronoma
D. Renal oncocytoma
Answer: B. Pheochromocytoma
Rationale: Pheochromocytomas arise from chromaffin cells and
secrete catecholamines, producing episodic hypertension, headaches,
sweating, and palpitations. Elevated plasma metanephrines are
highly sensitive diagnostic markers.
4. A 24-year-old woman presents with fatigue and pallor.
Hemoglobin is 8.2 g/dL. MCV is 68 fL. Ferritin is markedly
decreased. Which laboratory finding is also expected?
A. Increased transferrin saturation
B. Decreased total iron-binding capacity
C. Increased total iron-binding capacity
D. Elevated vitamin B12
,Answer: C. Increased total iron-binding capacity
Rationale: Iron deficiency anemia causes low ferritin, low serum iron,
and increased TIBC due to compensatory transferrin production.
Transferrin saturation is decreased rather than increased.
5. A hospitalized patient develops fever and hypotension. Blood
cultures reveal gram-negative rods. Which mediator is primarily
responsible for septic shock-associated vasodilation?
A. Histamine
B. Nitric oxide
C. Dopamine
D. Endothelin
Answer: B. Nitric oxide
Rationale: Endotoxin-induced cytokine release stimulates inducible
nitric oxide synthase, resulting in profound vasodilation and
distributive shock characteristic of septic shock.
6. A 70-year-old smoker presents with hematuria. Cystoscopy
reveals a bladder mass. Which is the strongest risk factor for
transitional cell carcinoma of the bladder?
A. Hypercalcemia
B. Cigarette smoking
C. Hepatitis C infection
D. Obesity
Answer: B. Cigarette smoking
Rationale: Smoking is the most significant risk factor for urothelial
carcinoma. Aromatic amines in tobacco smoke are concentrated in
urine and damage bladder epithelium.
, 7. A patient with diabetic ketoacidosis is started on insulin therapy.
Which electrolyte abnormality commonly develops during
treatment?
A. Hypercalcemia
B. Hypernatremia
C. Hypokalemia
D. Hypermagnesemia
Answer: C. Hypokalemia
Rationale: Insulin drives potassium intracellularly. Although serum
potassium may initially appear elevated, total body potassium is
depleted and treatment can rapidly precipitate hypokalemia.
8. A 60-year-old man reports chest pain during exertion that
resolves with rest. Coronary angiography reveals a 70% stenosis of
the left anterior descending artery. What is the pathophysiologic
basis of stable angina?
A. Complete thrombotic occlusion
B. Coronary vasospasm only
C. Fixed atherosclerotic narrowing
D. Myocarditis
Answer: C. Fixed atherosclerotic narrowing
Rationale: Stable angina occurs when fixed atherosclerotic lesions
limit blood flow during increased oxygen demand. Symptoms
predictably occur with exertion and improve with rest.
9. A 35-year-old woman presents with weight loss, heat intolerance,
and tremor. Laboratory testing reveals suppressed TSH and
elevated free T4. Which physical finding is most specific for
Graves disease?
