ANCC-AGACNP-BC

A 68-year-old patient presents with acute onset of severe tearing chest pain radiating to the back. Blood pressure is 180/110 mmHg in the right arm and 130/80 mmHg in the left arm. Which pathophysiological mechanism best explains these findings?

• ADissection of the intima with blood creating a false lumen in the aorta
• BRupture of atherosclerotic plaque causing coronary artery thrombosis
• CWeakening of the aortic wall leading to localized dilation and rupture
• DInflammation of the aortic wall causing stenosis and hypertension

In acute kidney injury, which hemodynamic change leads to the initial reduction in glomerular filtration rate (GFR)?

• AIncreased efferent arteriolar vasoconstriction
• BDecreased afferent arteriolar blood flow
• CIncreased hydrostatic pressure in Bowman capsule
• DDecreased oncotic pressure in the glomerular capillaries

Which pathophysiological process is responsible for the hypoxemia seen in acute pulmonary edema?

• AVentilation-perfusion mismatch due to alveolar flooding
• BDecreased diffusion capacity from thickened alveolar walls
• CRight-to-left shunt through pulmonary arteriovenous malformations
• DHyperventilation causing decreased PaCO2 and oxygen extraction

A patient with chronic liver disease develops hepatic encephalopathy. What is the primary neurotoxin responsible for this condition?

• ABilirubin accumulation in the cerebral cortex
• BAmmonia produced by bacterial metabolism in the gut
• CLactate from anaerobic metabolism in the brain
• DBile acids crossing the blood-brain barrier

A patient on warfarin for atrial fibrillation presents with an INR of 8.5 and minor gum bleeding. What is the most appropriate management?

• AAdminister vitamin K 10 mg IV immediately
• BHold warfarin and give vitamin K 2.5-5 mg orally
• CAdminister fresh frozen plasma and continue warfarin
• DHold warfarin only and monitor INR daily

Which pharmacokinetic parameter best predicts the time to steady-state concentration for a drug given by continuous IV infusion?

• AVolume of distribution (Vd)
• BElimination half-life (t1/2)
• CClearance (Cl)
• DBioavailability (F)

A patient with septic shock is receiving norepinephrine. Which receptor binding profile explains its therapeutic effects?

• ASelective beta-1 agonism increasing cardiac contractility
• BAlpha-1 and beta-1 agonism causing vasoconstriction and inotropy
• CSelective alpha-1 agonism causing pure vasoconstriction
• DBeta-2 agonism causing bronchodilation and vasodilation

Which mechanism explains why ACE inhibitors cause a dry cough?

• AIncreased bradykinin and substance P accumulation
• BDirect irritation of bronchial mucosa
• CHistamine release from mast cells
• DCholinergic receptor stimulation in the lungs

During cardiac auscultation, a patient has an S4 heart sound. What does this finding indicate?

• AVolume overload with ventricular dilation
• BDecreased ventricular compliance and atrial contraction against a stiff ventricle
• CMitral valve prolapse with regurgitation
• DNormal finding in healthy young adults

A patient presents with acute abdominal pain. During palpation, a pulsatile mass is felt in the epigastrium. What is the most appropriate next action?

• AContinue deep palpation to characterize the mass borders
• BPerform immediate CT angiography without further palpation
• CGently assess the mass then obtain urgent imaging
• DAuscultate the mass for bruits before proceeding

On pulmonary examination, crackles are heard at the lung bases bilaterally that do not clear with coughing. These findings are most consistent with:

• AChronic bronchitis with mucus production
• BInterstitial pulmonary fibrosis or early heart failure
• CPneumothorax with pleural air accumulation
• DAsthma with bronchospasm

A neurological exam reveals a positive Babinski sign (upgoing toe) on the right side. What does this finding indicate?

• APeripheral nerve damage in the lower extremity
• BUpper motor neuron lesion affecting the corticospinal tract
• CCerebellar dysfunction affecting coordination
• DLower motor neuron lesion at the spinal cord level

A 72-year-old presents with acute chest pain, ST elevation in V1-V4, and hypotension (BP 82/50). Which intervention should be performed first?

• AAdminister aspirin 325 mg orally
• BObtain emergent PCI within 90 minutes
• CGive IV fluids for volume resuscitation
• DAdminister nitroglycerin sublingually

Which ECG finding is most specific for diagnosing atrial flutter?

• AIrregularly irregular rhythm with no discernible P waves
• BSawtooth pattern flutter waves at 250-350 bpm
• CRegular narrow complex tachycardia with retrograde P waves
• DProlonged PR interval with dropped beats

A patient with heart failure has a blood pressure of 156/92 mmHg. According to current guidelines, what is the target BP for this patient?

• A<150/90 mmHg
• B<140/90 mmHg
• C<130/80 mmHg
• D<120/80 mmHg

Which finding on echocardiography confirms the diagnosis of hypertrophic cardiomyopathy (HCM)?

• ALeft ventricular ejection fraction <40%
• BLeft ventricular wall thickness >=15 mm in the absence of other causes
• CDilated left ventricle with thinning of walls
• DRegional wall motion abnormalities in coronary distributions

A patient with atrial fibrillation and a CHA2DS2-VASc score of 4 is started on apixaban. What is the primary mechanism by which apixaban prevents stroke?

• AInhibition of vitamin K-dependent clotting factors
• BDirect inhibition of factor Xa
• CInhibition of platelet aggregation via P2Y12 receptor
• DDirect inhibition of thrombin (factor IIa)

A patient with COPD has an ABG showing pH 7.32, PaCO2 58 mmHg, PaO2 62 mmHg on room air. Which interpretation is correct?

• AAcute respiratory alkalosis with hypoxemia
• BChronic respiratory acidosis with hypoxemia
• CAcute-on-chronic respiratory acidosis with hypoxemia
• DMetabolic acidosis with respiratory compensation

Which clinical finding is most specific for diagnosing a pneumothorax?

• ADecreased breath sounds on the affected side with hyperresonance to percussion
• BCrackles heard throughout all lung fields
• CWheezing that improves with bronchodilator therapy
• DDullness to percussion at the lung bases

A patient with severe community-acquired pneumonia has a CURB-65 score of 3. What is the recommended management?

• AOutpatient therapy with oral antibiotics
• BInpatient admission for IV antibiotics
• CICU admission with broad-spectrum antibiotics
• DObservation in the emergency department for 6 hours

A patient with acute hypoxemic respiratory failure has a PaO2/FiO2 ratio of 180. Which severity category applies?

• AMild ARDS
• BModerate ARDS
• CSevere ARDS
• DNot meeting ARDS criteria

A patient presents with severe upper GI bleeding. Vital signs show BP 94/60, HR 118. Which fluid should be administered first?

• APacked red blood cells immediately
• BIsotonic crystalloid (normal saline or lactated Ringer)
• CFresh frozen plasma
• DAlbumin solution