COMPREHENSIVE PROFESSIONAL NURSING
EXAMINATION:
POST-OPERATIVE COARCTATION OF THE AORTA
REPAIR
200 Clinical Questions with Advanced Hemodynamic Assessment &
Evidence-Based Rationales
DOMINANT CLINICAL DOMAIN: HEMODYNAMIC
MONITORING & PARADOXICAL HYPERTENSION
Question 1: A nurse is assessing an infant who has post-operative
coarctation of the aorta repair. Which of the following findings should
the nurse expect?
A. Bounding femoral pulses and warm lower extremities
B. Weak or absent femoral pulses compared to brachial pulses
C. Severe hypotension in the upper extremities
D. Persistent metabolic alkalosis with hyperkalemia
Rationale: Correct Answer: (A). Following successful surgical repair
of coarctation of the aorta (CoA), the mechanical obstruction in the
descending aorta is relieved, restoring robust blood flow to the lower
body. Consequently, the nurse should expect bounding femoral pulses
and warm, well-perfused lower extremities, reversing the pre-
operative disparity of weak lower extremity pulses and upper-
extremity hypertension.
DOMINANT CLINICAL DOMAIN: HEMODYNAMIC
MONITORING & PARADOXICAL HYPERTENSION
,Question 1: A nurse is assessing an infant who has post-operative
coarctation of the aorta repair. Which of the following findings should
the nurse expect?
A. Bounding femoral pulses and warm lower extremities
B. Weak or absent femoral pulses compared to brachial pulses
C. Severe hypotension in the upper extremities
D. Persistent metabolic alkalosis with hyperkalemia
Rationale: Correct Answer: (A). Following successful surgical repair
of coarctation of the aorta (CoA), the mechanical obstruction in the
descending aorta is relieved, restoring robust blood flow to the lower
body. Consequently, the nurse should expect bounding femoral pulses
and warm, well-perfused lower extremities, reversing the pre-
operative disparity of weak lower extremity pulses and upper-
extremity hypertension.
Question 2: When evaluating an infant 12 hours post-coarctation of the
aorta repair, the nurse notes a blood pressure in the right arm of 118/74
mmHg and in the lower extremities of 82/48 mmHg. What is the nurse's
priority action?
A. Immediately notify the surgeon regarding persistent
paradoxical hypertension
B. Document the finding as normal post-operative transition
C. Administer a fluid bolus of normal saline 20 mL/kg
D. Prepare the infant for emergency re-exploration
Rationale: Correct Answer: (A). Paradoxical hypertension (systolic
hypertension in the upper body despite repair) commonly occurs
post-operatively due to a sudden surge in catecholamines, renin, and
angiotensin II following relief of aortic obstruction. Uncontrolled
hypertension places excessive stress on the anastomosis site and
, increases risk of post-operative hemorrhage or posterior reversible
encephalopathy syndrome (PRES). Medical management with
antihypertensives (e.g., esmolol or nitroprusside) is warranted.
Question 3: An infant post-repair of coarctation of the aorta develops
severe abdominal distension, absent bowel sounds, and guaiac-positive
stools on postoperative day 2. The nurse recognizes these findings as
indicative of which serious complication?
A. Necrotizing enterocolitis (NEC) secondary to mesenteric
reperfusion injury
B. Normal transient ileus following thoracic surgery
C. Post-operative intussusception from opioid use
D. Diaphragmatic paralysis from phrenic nerve injury
Rationale: Correct Answer: (A). Post-operative mesenteric arteritis
(or rebound mesenteric ischemia/reperfusion injury) can occur
following coarctation repair as blood flow suddenly surges into
previously underperfused splanchnic beds. This manifests similarly to
necrotizing enterocolitis with abdominal distension, feeding
intolerance, bloody stools, and diminished bowel sounds.
Question 4: Which of the following interventions is most critical during
the immediate post-operative period following coarctation of the aorta
repair to prevent neurologic deficits?
A. Continuous monitoring of lower extremity motor and sensory
function
B. Maintaining strict Trendelenburg positioning
C. Administering prophylactic broad-spectrum antibiotics
D. Keeping systolic blood pressure at pre-operative baselines
Rationale: Correct Answer: (A). Spinal cord ischemia is a
devastating potential complication of coarctation repair due to cross-
, clamping of the aorta during surgery, which interrupts collateral
blood supply to the anterior spinal artery. Frequent, rigorous
assessment of lower extremity motor function, movement, and
sensation is essential for early detection of spinal cord injury.
Question 5: A nurse is reviewing laboratory results for an infant 24
hours after coarctation of the aorta resection. Which finding requires
immediate provider notification?
A. Serum creatinine of 1.8 mg/dL and oliguria (< 1 mL/kg/hr)
B. Hemoglobin of 13.5 g/dL and hematocrit of 40%
C. Serum sodium of 138 mEq/L and potassium of 4.2 mEq/L
D. Arterial blood gas showing pH 7.36, PaCO2 40 mmHg, HCO3 24
mEq/L
Rationale: Correct Answer: (A). Acute kidney injury (AKI) can occur
due to renal artery hypoperfusion during aortic cross-clamping or
post-operative hemodynamic instability. Oliguria (< 1 mL/kg/hr in
infants) and rising serum creatinine indicate impaired renal function
requiring urgent intervention.
Question 6: Which blood pressure assessment technique is essential
when monitoring an infant after coarctation of the aorta repair?
A. Simultaneous four-extremity blood pressure measurements
B. Right arm blood pressure measurement only
C. Lower extremity blood pressure measurement using an
appropriately sized cuff
D. Left leg blood pressure measurement via Doppler ultrasound
Rationale: Correct Answer: (A). Simultaneous four-extremity blood
pressure measurements allow the nurse to compare upper and lower
extremity pressures, ensuring that the blood pressure gradient has
EXAMINATION:
POST-OPERATIVE COARCTATION OF THE AORTA
REPAIR
200 Clinical Questions with Advanced Hemodynamic Assessment &
Evidence-Based Rationales
DOMINANT CLINICAL DOMAIN: HEMODYNAMIC
MONITORING & PARADOXICAL HYPERTENSION
Question 1: A nurse is assessing an infant who has post-operative
coarctation of the aorta repair. Which of the following findings should
the nurse expect?
A. Bounding femoral pulses and warm lower extremities
B. Weak or absent femoral pulses compared to brachial pulses
C. Severe hypotension in the upper extremities
D. Persistent metabolic alkalosis with hyperkalemia
Rationale: Correct Answer: (A). Following successful surgical repair
of coarctation of the aorta (CoA), the mechanical obstruction in the
descending aorta is relieved, restoring robust blood flow to the lower
body. Consequently, the nurse should expect bounding femoral pulses
and warm, well-perfused lower extremities, reversing the pre-
operative disparity of weak lower extremity pulses and upper-
extremity hypertension.
DOMINANT CLINICAL DOMAIN: HEMODYNAMIC
MONITORING & PARADOXICAL HYPERTENSION
,Question 1: A nurse is assessing an infant who has post-operative
coarctation of the aorta repair. Which of the following findings should
the nurse expect?
A. Bounding femoral pulses and warm lower extremities
B. Weak or absent femoral pulses compared to brachial pulses
C. Severe hypotension in the upper extremities
D. Persistent metabolic alkalosis with hyperkalemia
Rationale: Correct Answer: (A). Following successful surgical repair
of coarctation of the aorta (CoA), the mechanical obstruction in the
descending aorta is relieved, restoring robust blood flow to the lower
body. Consequently, the nurse should expect bounding femoral pulses
and warm, well-perfused lower extremities, reversing the pre-
operative disparity of weak lower extremity pulses and upper-
extremity hypertension.
Question 2: When evaluating an infant 12 hours post-coarctation of the
aorta repair, the nurse notes a blood pressure in the right arm of 118/74
mmHg and in the lower extremities of 82/48 mmHg. What is the nurse's
priority action?
A. Immediately notify the surgeon regarding persistent
paradoxical hypertension
B. Document the finding as normal post-operative transition
C. Administer a fluid bolus of normal saline 20 mL/kg
D. Prepare the infant for emergency re-exploration
Rationale: Correct Answer: (A). Paradoxical hypertension (systolic
hypertension in the upper body despite repair) commonly occurs
post-operatively due to a sudden surge in catecholamines, renin, and
angiotensin II following relief of aortic obstruction. Uncontrolled
hypertension places excessive stress on the anastomosis site and
, increases risk of post-operative hemorrhage or posterior reversible
encephalopathy syndrome (PRES). Medical management with
antihypertensives (e.g., esmolol or nitroprusside) is warranted.
Question 3: An infant post-repair of coarctation of the aorta develops
severe abdominal distension, absent bowel sounds, and guaiac-positive
stools on postoperative day 2. The nurse recognizes these findings as
indicative of which serious complication?
A. Necrotizing enterocolitis (NEC) secondary to mesenteric
reperfusion injury
B. Normal transient ileus following thoracic surgery
C. Post-operative intussusception from opioid use
D. Diaphragmatic paralysis from phrenic nerve injury
Rationale: Correct Answer: (A). Post-operative mesenteric arteritis
(or rebound mesenteric ischemia/reperfusion injury) can occur
following coarctation repair as blood flow suddenly surges into
previously underperfused splanchnic beds. This manifests similarly to
necrotizing enterocolitis with abdominal distension, feeding
intolerance, bloody stools, and diminished bowel sounds.
Question 4: Which of the following interventions is most critical during
the immediate post-operative period following coarctation of the aorta
repair to prevent neurologic deficits?
A. Continuous monitoring of lower extremity motor and sensory
function
B. Maintaining strict Trendelenburg positioning
C. Administering prophylactic broad-spectrum antibiotics
D. Keeping systolic blood pressure at pre-operative baselines
Rationale: Correct Answer: (A). Spinal cord ischemia is a
devastating potential complication of coarctation repair due to cross-
, clamping of the aorta during surgery, which interrupts collateral
blood supply to the anterior spinal artery. Frequent, rigorous
assessment of lower extremity motor function, movement, and
sensation is essential for early detection of spinal cord injury.
Question 5: A nurse is reviewing laboratory results for an infant 24
hours after coarctation of the aorta resection. Which finding requires
immediate provider notification?
A. Serum creatinine of 1.8 mg/dL and oliguria (< 1 mL/kg/hr)
B. Hemoglobin of 13.5 g/dL and hematocrit of 40%
C. Serum sodium of 138 mEq/L and potassium of 4.2 mEq/L
D. Arterial blood gas showing pH 7.36, PaCO2 40 mmHg, HCO3 24
mEq/L
Rationale: Correct Answer: (A). Acute kidney injury (AKI) can occur
due to renal artery hypoperfusion during aortic cross-clamping or
post-operative hemodynamic instability. Oliguria (< 1 mL/kg/hr in
infants) and rising serum creatinine indicate impaired renal function
requiring urgent intervention.
Question 6: Which blood pressure assessment technique is essential
when monitoring an infant after coarctation of the aorta repair?
A. Simultaneous four-extremity blood pressure measurements
B. Right arm blood pressure measurement only
C. Lower extremity blood pressure measurement using an
appropriately sized cuff
D. Left leg blood pressure measurement via Doppler ultrasound
Rationale: Correct Answer: (A). Simultaneous four-extremity blood
pressure measurements allow the nurse to compare upper and lower
extremity pressures, ensuring that the blood pressure gradient has
