,CSC Cardiac Surgery Exam 2026 | Comprehensive Test Bank |
Questions And Answers
I. PROCEDURES
Cardiovascular Procedures
Q1. A patient returns to the ICU after coronary artery bypass
grafting performed with cardiopulmonary bypass. Which physiologic
effect is most closely associated with exposure to the bypass
circuit?
A) Complete elimination of inflammatory activation
B) Systemic inflammatory response with capillary permeability changes
C) Permanent suppression of coagulation
D) Immediate normalization of pulmonary vascular resistance
Correct Answer: B) Systemic inflammatory response with capillary
permeability changes
Rationale: Cardiopulmonary bypass exposes blood to nonphysiologic
surfaces and can activate inflammatory, coagulation, and complement
pathways. Resulting capillary leak may contribute to edema, altered vascular
tone, pulmonary dysfunction, and postoperative fluid shifts.
Q2. A patient undergoes off-pump CABG. Which feature most
distinguishes this procedure from conventional CABG with
cardiopulmonary bypass?
A) Coronary grafting is performed while the heart continues beating
B) No sternotomy can ever be used
C) Systemic anticoagulation is unnecessary
D) Mechanical stabilization of the operative field is unnecessary
Correct Answer: A) Coronary grafting is performed while the heart continues
beating
Rationale: Off-pump CABG allows coronary graft construction without
placing the patient on cardiopulmonary bypass or intentionally arresting the
heart. Stabilization devices are used to limit motion in the operative area.
Q3. During off-pump CABG, the surgeon positions the heart to
expose a lateral coronary target. Blood pressure suddenly falls and
cardiac output decreases. What is the most likely mechanism?
,A) Excessive pulmonary surfactant production
B) Acute renal artery obstruction
C) Mechanical distortion reducing ventricular filling and output
D) Sudden elimination of systemic vascular resistance
Correct Answer: C) Mechanical distortion reducing ventricular filling and
output
Rationale: Manipulation of the beating heart can impair venous return,
ventricular filling, and right or left ventricular function. Hemodynamic
deterioration may therefore occur during positioning for distal coronary
anastomoses.
Q4. A patient undergoing a Cox maze procedure asks why it is being
performed during valve surgery. What is the primary purpose?
A) Increase ventricular contractility
B) Repair coronary stenosis
C) Replace the atrioventricular node
D) Interrupt abnormal atrial conduction pathways that sustain atrial
fibrillation
Correct Answer: D) Interrupt abnormal atrial conduction pathways that
sustain atrial fibrillation
Rationale: The maze procedure creates strategic lines of conduction block
within the atria. These lesions prevent large reentrant circuits and encourage
organized conduction from the sinus node toward the atrioventricular node.
Q5. Which postoperative rhythm issue deserves particular
surveillance after a surgical maze procedure?
A) Bradyarrhythmia or sinus-node dysfunction
B) Hyperacute T waves from hyperkalemia only
C) Persistent ventricular fibrillation in every patient
D) Complete absence of atrial electrical activity in every patient
Correct Answer: A) Bradyarrhythmia or sinus-node dysfunction
Rationale: Surgical ablation may affect atrial conduction or reveal
preexisting sinus-node dysfunction. Temporary pacing may be needed while
rhythm stability and conduction recover.
, Q6. A patient returns after minimally invasive mitral valve surgery
through a right thoracic approach. Which postoperative issue is
particularly important to assess?
A) Right-sided pleural drainage and pulmonary expansion
B) Only lower-extremity arterial pulses
C) Absence of all chest discomfort
D) Elimination of respiratory complications
Correct Answer: A) Right-sided pleural drainage and pulmonary expansion
Rationale: Minimally invasive thoracic approaches may involve pleural entry
and one-lung ventilation. Postoperative assessment should include chest-
drain function, breath sounds, lung expansion, oxygenation, and evidence of
pneumothorax or pleural collection.
Q7. A pericardial window is performed for a recurrent symptomatic
pericardial effusion. What is the procedure intended to accomplish?
A) Close the pericardial space completely
B) Create a route for ongoing pericardial fluid drainage
C) Repair the mitral valve
D) Replace the ascending aorta
Correct Answer: B) Create a route for ongoing pericardial fluid drainage
Rationale: A pericardial window creates an opening that allows fluid to
leave the pericardial space, reducing recurrence and preventing pressure
accumulation that could impair cardiac filling.
Q8. A patient undergoes surgical repair of a post-MI ventricular
septal defect. Which preoperative physiologic abnormality is the
repair intended to eliminate?
A) Right-to-left atrial shunting
B) Fixed aortic obstruction
C) Abnormal left-to-right ventricular shunting
D) Pulmonary venous obstruction
Correct Answer: C) Abnormal left-to-right ventricular shunting
Rationale: Post-infarction septal rupture allows high-pressure left ventricular
blood to enter the right ventricle during systole. The resulting shunt can
produce pulmonary overcirculation, right ventricular overload, and
cardiogenic shock.
Questions And Answers
I. PROCEDURES
Cardiovascular Procedures
Q1. A patient returns to the ICU after coronary artery bypass
grafting performed with cardiopulmonary bypass. Which physiologic
effect is most closely associated with exposure to the bypass
circuit?
A) Complete elimination of inflammatory activation
B) Systemic inflammatory response with capillary permeability changes
C) Permanent suppression of coagulation
D) Immediate normalization of pulmonary vascular resistance
Correct Answer: B) Systemic inflammatory response with capillary
permeability changes
Rationale: Cardiopulmonary bypass exposes blood to nonphysiologic
surfaces and can activate inflammatory, coagulation, and complement
pathways. Resulting capillary leak may contribute to edema, altered vascular
tone, pulmonary dysfunction, and postoperative fluid shifts.
Q2. A patient undergoes off-pump CABG. Which feature most
distinguishes this procedure from conventional CABG with
cardiopulmonary bypass?
A) Coronary grafting is performed while the heart continues beating
B) No sternotomy can ever be used
C) Systemic anticoagulation is unnecessary
D) Mechanical stabilization of the operative field is unnecessary
Correct Answer: A) Coronary grafting is performed while the heart continues
beating
Rationale: Off-pump CABG allows coronary graft construction without
placing the patient on cardiopulmonary bypass or intentionally arresting the
heart. Stabilization devices are used to limit motion in the operative area.
Q3. During off-pump CABG, the surgeon positions the heart to
expose a lateral coronary target. Blood pressure suddenly falls and
cardiac output decreases. What is the most likely mechanism?
,A) Excessive pulmonary surfactant production
B) Acute renal artery obstruction
C) Mechanical distortion reducing ventricular filling and output
D) Sudden elimination of systemic vascular resistance
Correct Answer: C) Mechanical distortion reducing ventricular filling and
output
Rationale: Manipulation of the beating heart can impair venous return,
ventricular filling, and right or left ventricular function. Hemodynamic
deterioration may therefore occur during positioning for distal coronary
anastomoses.
Q4. A patient undergoing a Cox maze procedure asks why it is being
performed during valve surgery. What is the primary purpose?
A) Increase ventricular contractility
B) Repair coronary stenosis
C) Replace the atrioventricular node
D) Interrupt abnormal atrial conduction pathways that sustain atrial
fibrillation
Correct Answer: D) Interrupt abnormal atrial conduction pathways that
sustain atrial fibrillation
Rationale: The maze procedure creates strategic lines of conduction block
within the atria. These lesions prevent large reentrant circuits and encourage
organized conduction from the sinus node toward the atrioventricular node.
Q5. Which postoperative rhythm issue deserves particular
surveillance after a surgical maze procedure?
A) Bradyarrhythmia or sinus-node dysfunction
B) Hyperacute T waves from hyperkalemia only
C) Persistent ventricular fibrillation in every patient
D) Complete absence of atrial electrical activity in every patient
Correct Answer: A) Bradyarrhythmia or sinus-node dysfunction
Rationale: Surgical ablation may affect atrial conduction or reveal
preexisting sinus-node dysfunction. Temporary pacing may be needed while
rhythm stability and conduction recover.
, Q6. A patient returns after minimally invasive mitral valve surgery
through a right thoracic approach. Which postoperative issue is
particularly important to assess?
A) Right-sided pleural drainage and pulmonary expansion
B) Only lower-extremity arterial pulses
C) Absence of all chest discomfort
D) Elimination of respiratory complications
Correct Answer: A) Right-sided pleural drainage and pulmonary expansion
Rationale: Minimally invasive thoracic approaches may involve pleural entry
and one-lung ventilation. Postoperative assessment should include chest-
drain function, breath sounds, lung expansion, oxygenation, and evidence of
pneumothorax or pleural collection.
Q7. A pericardial window is performed for a recurrent symptomatic
pericardial effusion. What is the procedure intended to accomplish?
A) Close the pericardial space completely
B) Create a route for ongoing pericardial fluid drainage
C) Repair the mitral valve
D) Replace the ascending aorta
Correct Answer: B) Create a route for ongoing pericardial fluid drainage
Rationale: A pericardial window creates an opening that allows fluid to
leave the pericardial space, reducing recurrence and preventing pressure
accumulation that could impair cardiac filling.
Q8. A patient undergoes surgical repair of a post-MI ventricular
septal defect. Which preoperative physiologic abnormality is the
repair intended to eliminate?
A) Right-to-left atrial shunting
B) Fixed aortic obstruction
C) Abnormal left-to-right ventricular shunting
D) Pulmonary venous obstruction
Correct Answer: C) Abnormal left-to-right ventricular shunting
Rationale: Post-infarction septal rupture allows high-pressure left ventricular
blood to enter the right ventricle during systole. The resulting shunt can
produce pulmonary overcirculation, right ventricular overload, and
cardiogenic shock.
