STEP 2 CK NBME FORM 7 ACTUAL EXAM 2026/2027 |
Updated Edition | Complete Solutions with Detailed Clinical
Rationales | USMLE Step 2 Prep | Pass Guaranteed - A+
Graded
Section 1: Internal Medicine (Questions 1-80)
Q1
A 62-year-old man with a history of hypertension and type 2 diabetes mellitus presents
to the emergency department with crushing substernal chest pain radiating to his left
arm that began 2 hours ago. He is diaphoretic and appears anxious. Vital signs: BP
88/56 mmHg, HR 110 bpm, RR 24/min, O2 sat 92% on room air. Physical examination
reveals cool, clammy extremities and bilateral basilar crackles. ECG shows ST-segment
elevation in leads V1-V4. Troponin I is pending. Which of the following is the most
appropriate immediate management step?
A. Aspirin, clopidogrel, and immediate cardiac catheterization
B. Aspirin, clopidogrel, and thrombolytic therapy
C. Aspirin, clopidogrel, nitroglycerin, and emergent percutaneous coronary intervention
[CORRECT]
D. Aspirin, heparin infusion, and stress echocardiography in 48 hours
E. Aspirin, metoprolol, and serial troponins with cardiology consultation
Correct Answer: C
Rationale: This patient presents with an acute anterior ST-elevation myocardial
infarction (STEMI) based on characteristic symptoms and ECG findings in leads V1-V4
(anterior wall). He is hemodynamically unstable with hypotension (88/56 mmHg) and
,signs of cardiogenic shock (cool extremities, pulmonary edema). The standard of care
for STEMI is emergent reperfusion therapy. Primary percutaneous coronary intervention
(PCI) is preferred over thrombolytics when available within 90-120 minutes, especially in
cardiogenic shock where PCI has demonstrated survival benefit (SHOCK trial).
Nitroglycerin is appropriate for ongoing chest pain and afterload reduction, provided
blood pressure permits (SBP >90 mmHg; here it's borderline but necessary given
anterior MI).
Why other options are incorrect:
● A misses nitroglycerin for pain relief and afterload reduction, and "immediate
cardiac catheterization" without specifying PCI is imprecise.
● B Thrombolytics are inferior to PCI in cardiogenic shock and when
door-to-balloon time is <90 minutes.
● D Stress testing is contraindicated in acute STEMI; heparin alone without
reperfusion is insufficient.
● E Beta-blockers are relatively contraindicated in acute heart failure/cardiogenic
shock; serial troponins delay definitive therapy.
Q2
A 28-year-old woman presents with 3 weeks of progressive dyspnea on exertion,
orthopnea, and bilateral lower extremity edema. She had a viral upper respiratory
infection 1 month ago. Vital signs: BP 98/64 mmHg, HR 118 bpm, RR 22/min. Physical
examination reveals elevated JVP, an S3 gallop, and bilateral pulmonary rales. ECG
shows sinus tachycardia with diffuse ST-segment elevation and PR depression.
Echocardiogram reveals global hypokinesis with ejection fraction 25%. Which of the
following is the most likely diagnosis?
A. Acute bacterial endocarditis
B. Acute pericarditis
C. Dilated cardiomyopathy secondary to viral myocarditis [CORRECT]
D. Hypertrophic cardiomyopathy
,E. Restrictive cardiomyopathy
Correct Answer: C
Rationale: This young patient presents with acute-onset biventricular heart failure
(dyspnea, orthopnea, edema, S3 gallop, pulmonary rales) following a viral prodrome.
The ECG findings of diffuse ST elevation with PR depression are classic for pericarditis,
but in this context with severe LV dysfunction (EF 25%), these ECG changes reflect
associated epicardial inflammation from myocarditis. The combination of recent viral
illness, new heart failure with reduced ejection fraction, and characteristic ECG changes
strongly supports acute viral myocarditis leading to dilated cardiomyopathy.
Endomyocardial biopsy (if performed) would show inflammatory infiltrates with
myocyte necrosis.
Why other options are incorrect:
● A Endocarditis would present with fever, murmur, and peripheral stigmata; no
mention of these.
● B Pericarditis alone doesn't explain the severe LV dysfunction and heart failure.
● D Hypertrophic cardiomyopathy features preserved EF, asymmetric septal
hypertrophy, and dynamic outflow obstruction—opposite of this presentation.
● E Restrictive cardiomyopathy presents with preserved EF, diastolic dysfunction,
and biatrial enlargement without global hypokinesis.
Q3
A 45-year-old man with alcohol use disorder presents with hematemesis and melena.
He reports drinking 1 pint of vodka daily for the past 15 years. On examination, he has
spider angiomata, palmar erythema, and caput medusae. Vital signs: BP 92/58 mmHg,
HR 124 bpm. Hemoglobin is 7.2 g/dL. After initial fluid resuscitation with 2L crystalloid,
his blood pressure remains 88/52 mmHg. Which of the following is the most
appropriate next step in management?
, A. Immediate transfusion of 4 units packed red blood cells
B. Emergent upper endoscopy with band ligation
C. Placement of a nasogastric tube for gastric lavage
D. Transfusion of packed red blood cells and initiation of octreotide with emergent
endoscopy [CORRECT]
E. Administration of fresh frozen plasma and vitamin K
Correct Answer: D
Rationale: This patient has cirrhosis with stigmata of chronic liver disease and presents
with acute variceal hemorrhage, the most life-threatening complication of portal
hypertension. Despite 2L crystalloid, he remains hypotensive (MAP <65 mmHg),
indicating ongoing hemorrhagic shock requiring blood transfusion. Current guidelines
recommend a restrictive transfusion strategy (Hgb target 7-9 g/dL) but immediate
transfusion is indicated for hemodynamic instability. Octreotide (somatostatin analog)
reduces splanchnic blood flow and portal pressure, decreasing bleeding and improving
visualization at endoscopy. Emergent endoscopy (within 12 hours) is indicated for
diagnostic confirmation and therapeutic intervention (band ligation for esophageal
varices). This combined approach addresses stabilization, pharmacologic control, and
definitive therapy.
Why other options are incorrect:
● A Massive transfusion without octreotide and endoscopy delays definitive
control.
● B Endoscopy without hemodynamic stabilization risks procedural complications.
● C Nasogastric lavage is controversial, doesn't treat bleeding, and may precipitate
retching/worsening variceal bleeding.
● E While coagulopathy may exist, FFP doesn't address active hemorrhage; vitamin
K takes days to correct INR in liver disease.
Q4
Updated Edition | Complete Solutions with Detailed Clinical
Rationales | USMLE Step 2 Prep | Pass Guaranteed - A+
Graded
Section 1: Internal Medicine (Questions 1-80)
Q1
A 62-year-old man with a history of hypertension and type 2 diabetes mellitus presents
to the emergency department with crushing substernal chest pain radiating to his left
arm that began 2 hours ago. He is diaphoretic and appears anxious. Vital signs: BP
88/56 mmHg, HR 110 bpm, RR 24/min, O2 sat 92% on room air. Physical examination
reveals cool, clammy extremities and bilateral basilar crackles. ECG shows ST-segment
elevation in leads V1-V4. Troponin I is pending. Which of the following is the most
appropriate immediate management step?
A. Aspirin, clopidogrel, and immediate cardiac catheterization
B. Aspirin, clopidogrel, and thrombolytic therapy
C. Aspirin, clopidogrel, nitroglycerin, and emergent percutaneous coronary intervention
[CORRECT]
D. Aspirin, heparin infusion, and stress echocardiography in 48 hours
E. Aspirin, metoprolol, and serial troponins with cardiology consultation
Correct Answer: C
Rationale: This patient presents with an acute anterior ST-elevation myocardial
infarction (STEMI) based on characteristic symptoms and ECG findings in leads V1-V4
(anterior wall). He is hemodynamically unstable with hypotension (88/56 mmHg) and
,signs of cardiogenic shock (cool extremities, pulmonary edema). The standard of care
for STEMI is emergent reperfusion therapy. Primary percutaneous coronary intervention
(PCI) is preferred over thrombolytics when available within 90-120 minutes, especially in
cardiogenic shock where PCI has demonstrated survival benefit (SHOCK trial).
Nitroglycerin is appropriate for ongoing chest pain and afterload reduction, provided
blood pressure permits (SBP >90 mmHg; here it's borderline but necessary given
anterior MI).
Why other options are incorrect:
● A misses nitroglycerin for pain relief and afterload reduction, and "immediate
cardiac catheterization" without specifying PCI is imprecise.
● B Thrombolytics are inferior to PCI in cardiogenic shock and when
door-to-balloon time is <90 minutes.
● D Stress testing is contraindicated in acute STEMI; heparin alone without
reperfusion is insufficient.
● E Beta-blockers are relatively contraindicated in acute heart failure/cardiogenic
shock; serial troponins delay definitive therapy.
Q2
A 28-year-old woman presents with 3 weeks of progressive dyspnea on exertion,
orthopnea, and bilateral lower extremity edema. She had a viral upper respiratory
infection 1 month ago. Vital signs: BP 98/64 mmHg, HR 118 bpm, RR 22/min. Physical
examination reveals elevated JVP, an S3 gallop, and bilateral pulmonary rales. ECG
shows sinus tachycardia with diffuse ST-segment elevation and PR depression.
Echocardiogram reveals global hypokinesis with ejection fraction 25%. Which of the
following is the most likely diagnosis?
A. Acute bacterial endocarditis
B. Acute pericarditis
C. Dilated cardiomyopathy secondary to viral myocarditis [CORRECT]
D. Hypertrophic cardiomyopathy
,E. Restrictive cardiomyopathy
Correct Answer: C
Rationale: This young patient presents with acute-onset biventricular heart failure
(dyspnea, orthopnea, edema, S3 gallop, pulmonary rales) following a viral prodrome.
The ECG findings of diffuse ST elevation with PR depression are classic for pericarditis,
but in this context with severe LV dysfunction (EF 25%), these ECG changes reflect
associated epicardial inflammation from myocarditis. The combination of recent viral
illness, new heart failure with reduced ejection fraction, and characteristic ECG changes
strongly supports acute viral myocarditis leading to dilated cardiomyopathy.
Endomyocardial biopsy (if performed) would show inflammatory infiltrates with
myocyte necrosis.
Why other options are incorrect:
● A Endocarditis would present with fever, murmur, and peripheral stigmata; no
mention of these.
● B Pericarditis alone doesn't explain the severe LV dysfunction and heart failure.
● D Hypertrophic cardiomyopathy features preserved EF, asymmetric septal
hypertrophy, and dynamic outflow obstruction—opposite of this presentation.
● E Restrictive cardiomyopathy presents with preserved EF, diastolic dysfunction,
and biatrial enlargement without global hypokinesis.
Q3
A 45-year-old man with alcohol use disorder presents with hematemesis and melena.
He reports drinking 1 pint of vodka daily for the past 15 years. On examination, he has
spider angiomata, palmar erythema, and caput medusae. Vital signs: BP 92/58 mmHg,
HR 124 bpm. Hemoglobin is 7.2 g/dL. After initial fluid resuscitation with 2L crystalloid,
his blood pressure remains 88/52 mmHg. Which of the following is the most
appropriate next step in management?
, A. Immediate transfusion of 4 units packed red blood cells
B. Emergent upper endoscopy with band ligation
C. Placement of a nasogastric tube for gastric lavage
D. Transfusion of packed red blood cells and initiation of octreotide with emergent
endoscopy [CORRECT]
E. Administration of fresh frozen plasma and vitamin K
Correct Answer: D
Rationale: This patient has cirrhosis with stigmata of chronic liver disease and presents
with acute variceal hemorrhage, the most life-threatening complication of portal
hypertension. Despite 2L crystalloid, he remains hypotensive (MAP <65 mmHg),
indicating ongoing hemorrhagic shock requiring blood transfusion. Current guidelines
recommend a restrictive transfusion strategy (Hgb target 7-9 g/dL) but immediate
transfusion is indicated for hemodynamic instability. Octreotide (somatostatin analog)
reduces splanchnic blood flow and portal pressure, decreasing bleeding and improving
visualization at endoscopy. Emergent endoscopy (within 12 hours) is indicated for
diagnostic confirmation and therapeutic intervention (band ligation for esophageal
varices). This combined approach addresses stabilization, pharmacologic control, and
definitive therapy.
Why other options are incorrect:
● A Massive transfusion without octreotide and endoscopy delays definitive
control.
● B Endoscopy without hemodynamic stabilization risks procedural complications.
● C Nasogastric lavage is controversial, doesn't treat bleeding, and may precipitate
retching/worsening variceal bleeding.
● E While coagulopathy may exist, FFP doesn't address active hemorrhage; vitamin
K takes days to correct INR in liver disease.
Q4
