Adult Health 2 Advanced Clinical Practice
Exam 2 250 questions, correct answers and
rationales
Cardiovascular Disorders
Question 1
Question: What is the primary pathophysiological mechanism responsible for unstable angina
compared to stable angina? Answer: Unstable angina is caused by the rupture or erosion of an
atherosclerotic plaque, leading to partial or transient thrombosis and acute, unpredictable
coronary blood flow reduction, whereas stable angina is triggered by predictable physical
exertion or emotional stress against a fixed coronary stenosis. Rationale: Unlike stable angina
which is relieved by rest or nitroglycerin and follows a predictable pattern, unstable angina
occurs at rest or with minimal exertion, is more severe, and represents an acute coronary
syndrome requiring immediate medical evaluation.
Question 2
Question: What electrocardiographic (ECG) changes characterize a transmural (STEMI)
myocardial infarction? Answer: ST-segment elevation in two or more contiguous leads,
followed by the development of abnormal Q waves and subsequent T-wave inversion.
Rationale: ST-segment elevation indicates full-thickness (transmural) myocardial injury
resulting from complete coronary artery occlusion, which requires urgent reperfusion therapy
(PCI or fibrinolysis).
Question 3
Question: Why is a troponin assay preferred over creatine kinase-MB (CK-MB) for the
diagnosis of acute myocardial infarction? Answer: Cardiac-specific troponins (Troponin T and
Troponin I) remain elevated longer and possess significantly higher myocardial tissue specificity
than CK-MB, which can be elevated due to skeletal muscle injury. Rationale: Troponins begin
to rise within 3 to 4 hours after myocardial injury and can remain elevated for 1 to 3 weeks,
providing a wide diagnostic window.
Question 4
Question: What is the primary pharmacological action of intravenous nitroglycerin when
administered during an acute myocardial infarction? Answer: It relaxes vascular smooth muscle,
causing systemic venodilation and coronary artery dilation, which decreases myocardial oxygen
demand (preload) and improves collateral blood flow. Rationale: By reducing venous return to
,the heart (preload) and dilating coronary arteries, nitroglycerin reduces ventricular wall stress
and myocardial oxygen consumption.
Question 5
Question: What is the priority nursing intervention when a patient undergoing percutaneous
coronary intervention (PCI) via the femoral approach develops sudden flank pain, tachycardia,
and hypotension? Answer: Immediately notify the Rapid Response Team/physician, stop any
ongoing anticoagulation if ordered, and assess the access site and abdomen for signs of
retroperitoneal hemorrhage or hematoma formation. Rationale: Femoral sheath removal or
arterial wall trauma during PCI can lead to severe retroperitoneal bleeding, manifesting as
hypotension and flank pain due to hidden blood accumulation.
Question 6
Question: What hemodynamic parameters define left-sided heart failure with reduced ejection
fraction (HFrEF)? Answer: Left ventricular ejection fraction (LVEF) ≤ 40 % accompanied by
clinical symptoms of systemic congestion, low cardiac output, and elevated pulmonary capillary
wedge pressure (PCWP). Rationale: HFrEF indicates impaired systolic contraction of the left
ventricle, causing blood to back up into the pulmonary circulation and leading to pulmonary
edema.
Question 7
Question: What is the primary compensatory mechanism activated by the renin-angiotensin-
aldosterone system (RAAS) in chronic heart failure, and why is it ultimately detrimental?
Answer: The RAAS causes vasoconstriction and sodium/water retention to maintain blood
pressure, but chronic activation increases cardiac workload, ventricular remodeling, and fluid
overload. Rationale: While short-term RAAS activation preserves perfusion, long-term
exposure to angiotensin II and aldosterone promotes myocardial fibrosis, myocyte hypertrophy,
and progressive heart failure worsening.
Question 8
Question: What laboratory test is the primary biomarker utilized to differentiate dyspnea caused
by acute heart failure from dyspnea caused by pulmonary disease? Answer: B-type Natriuretic
Peptide (BNP) or N-terminal pro-BNP (NT-proBNP). Rationale: Ventricular myocytes secrete
BNP in response to wall stretch and volume overload; levels are markedly elevated in acute heart
failure compared to primary pulmonary disorders like COPD.
Question 9
Question: What life-threatening complication must the nurse monitor for when administering an
ACE inhibitor to a patient with heart failure? Answer: Angioedema and hyperkalemia.
Rationale: ACE inhibitors prevent the degradation of bradykinin, which can lead to rapid
,swelling of the lips, tongue, and larynx (angioedema), and they decrease aldosterone secretion,
predisposing the patient to hyperkalemia.
Question 10
Question: What mechanical circulatory support device is commonly used as a bridge to
transplant or destination therapy for end-stage left ventricular heart failure? Answer: Left
Ventricular Assist Device (LVAD). Rationale: An LVAD is a surgically implanted pump that
takes over the function of the failing left ventricle by pulling blood from the LV and propelling it
into the aorta.
Question 11
Question: What are the classic physical exam findings associated with aortic stenosis? Answer:
A systolic crescendo-decrescendo murmur heard best at the second right intercostal space, a
narrowed pulse pressure, and a delayed, weak carotid pulse (pulsus parvus et tardus). Rationale:
Obstruction of blood flow across the calcified aortic valve during systole creates turbulent flow
and impairs forward stroke volume into the systemic circulation.
Question 12
Question: What diagnostic study is considered the gold standard for confirming infective
endocarditis? Answer: Echocardiography (specifically Transesophageal Echocardiogram, TEE)
combined with positive blood cultures (Duke criteria). Rationale: TEE provides high-resolution
visualization of cardiac valve structures to identify vegetation, abscesses, or valvular perforation.
Question 13
Question: What is the hallmark clinical manifestation of cardiac tamponade known as Beck's
triad? Answer: Hypotension, muffled heart sounds, and jugular venous distension (JVD).
Rationale: Fluid accumulation in the non-compliant pericardial sac restricts ventricular filling,
leading to decreased cardiac output and elevated central venous pressure.
Question 14
Question: What physical sign characterized by an inspiratory drop in systolic blood pressure
greater than 10 mmHg is indicative of cardiac tamponade? Answer: Pulsus paradoxus.
Rationale: During inspiration, increased venous return to the right ventricle shifts the
interventricular septum into the left ventricle, compromising left ventricular filling and systemic
arterial pressure.
Question 15
Question: What is the primary difference in pathophysiology between rheumatic fever and
infective endocarditis? Answer: Rheumatic fever is an autoimmune inflammatory reaction
following a group A beta-hemolytic streptococcal pharyngitis that damages heart valves, whereas
, infective endocarditis is a direct microbial infection of the endothelial surface of the heart.
Rationale: Rheumatic heart disease results from molecular mimicry attacking cardiac tissue,
while endocarditis involves bacterial or fungal colonization forming friable vegetations on heart
valves.
Question 16
Question: What emergent intervention is required when a patient with a permanent pacemaker
exhibits failure to capture? Answer: Placing the patient on transcutaneous pacing pads,
positioning them on their left side, and notifying the cardiologist for generator or lead
adjustment. Navbar/Rationale: Failure to capture occurs when pacemaker spikes are present but
are not followed by myocardial depolarization (P waves or QRS complexes), resulting in loss of
capture and potential hemodynamic collapse.
Question 17
Question: What is the mechanism of action of adenosine in treating paroxysmal supraventricular
tachycardia (PSVT)? Answer: It transiently slows conduction through the atrioventricular (AV)
node and interrupts reentry pathways, restoring normal sinus rhythm. Rationale: Adenosine has
an extremely short half-life (less than 10 seconds) and must be administered via a rapid IV push
close to the central circulation followed by a rapid saline flush.
Question 18
Question: What electrolyte abnormality significantly increases a patient's vulnerability to
digoxin toxicity? Answer: Hypokalemia. Rationale: Potassium and digoxin compete for the
+¿¿
same binding site on the Na+ ¿/K ¿-ATPase pump; low extracellular potassium enhances digoxin
binding, precipitating intracellular toxicity and dangerous arrhythmias.
Question 19
Question: What is the immediate treatment priority for a client presenting in ventricular
fibrillation? Answer: Immediate high-quality cardiopulmonary resuscitation (CPR) followed by
unsynchronized defibrillation as soon as a defibrillator is available. Rationale: Ventricular
fibrillation is a lethal, pulseless rhythm characterized by chaotic electrical activity; prompt
defibrillation is the only effective treatment to restore an organized rhythm.
Question 20
Question: What physical assessment technique is used to evaluate for deep vein thrombosis
(DVT) in the lower extremities, and why is it generally discouraged? Answer: Homan's sign
( dorsiflexion of the foot causing pain in the calf), which is discouraged because vigorous
manipulation can dislodge a thrombus, causing a pulmonary embolism. Rationale: Clinical
evaluation for DVT relies on objective scoring systems (Wells criteria), compression
ultrasonography, and D-dimer testing rather than unreliable and potentially hazardous physical
maneuvers.
Exam 2 250 questions, correct answers and
rationales
Cardiovascular Disorders
Question 1
Question: What is the primary pathophysiological mechanism responsible for unstable angina
compared to stable angina? Answer: Unstable angina is caused by the rupture or erosion of an
atherosclerotic plaque, leading to partial or transient thrombosis and acute, unpredictable
coronary blood flow reduction, whereas stable angina is triggered by predictable physical
exertion or emotional stress against a fixed coronary stenosis. Rationale: Unlike stable angina
which is relieved by rest or nitroglycerin and follows a predictable pattern, unstable angina
occurs at rest or with minimal exertion, is more severe, and represents an acute coronary
syndrome requiring immediate medical evaluation.
Question 2
Question: What electrocardiographic (ECG) changes characterize a transmural (STEMI)
myocardial infarction? Answer: ST-segment elevation in two or more contiguous leads,
followed by the development of abnormal Q waves and subsequent T-wave inversion.
Rationale: ST-segment elevation indicates full-thickness (transmural) myocardial injury
resulting from complete coronary artery occlusion, which requires urgent reperfusion therapy
(PCI or fibrinolysis).
Question 3
Question: Why is a troponin assay preferred over creatine kinase-MB (CK-MB) for the
diagnosis of acute myocardial infarction? Answer: Cardiac-specific troponins (Troponin T and
Troponin I) remain elevated longer and possess significantly higher myocardial tissue specificity
than CK-MB, which can be elevated due to skeletal muscle injury. Rationale: Troponins begin
to rise within 3 to 4 hours after myocardial injury and can remain elevated for 1 to 3 weeks,
providing a wide diagnostic window.
Question 4
Question: What is the primary pharmacological action of intravenous nitroglycerin when
administered during an acute myocardial infarction? Answer: It relaxes vascular smooth muscle,
causing systemic venodilation and coronary artery dilation, which decreases myocardial oxygen
demand (preload) and improves collateral blood flow. Rationale: By reducing venous return to
,the heart (preload) and dilating coronary arteries, nitroglycerin reduces ventricular wall stress
and myocardial oxygen consumption.
Question 5
Question: What is the priority nursing intervention when a patient undergoing percutaneous
coronary intervention (PCI) via the femoral approach develops sudden flank pain, tachycardia,
and hypotension? Answer: Immediately notify the Rapid Response Team/physician, stop any
ongoing anticoagulation if ordered, and assess the access site and abdomen for signs of
retroperitoneal hemorrhage or hematoma formation. Rationale: Femoral sheath removal or
arterial wall trauma during PCI can lead to severe retroperitoneal bleeding, manifesting as
hypotension and flank pain due to hidden blood accumulation.
Question 6
Question: What hemodynamic parameters define left-sided heart failure with reduced ejection
fraction (HFrEF)? Answer: Left ventricular ejection fraction (LVEF) ≤ 40 % accompanied by
clinical symptoms of systemic congestion, low cardiac output, and elevated pulmonary capillary
wedge pressure (PCWP). Rationale: HFrEF indicates impaired systolic contraction of the left
ventricle, causing blood to back up into the pulmonary circulation and leading to pulmonary
edema.
Question 7
Question: What is the primary compensatory mechanism activated by the renin-angiotensin-
aldosterone system (RAAS) in chronic heart failure, and why is it ultimately detrimental?
Answer: The RAAS causes vasoconstriction and sodium/water retention to maintain blood
pressure, but chronic activation increases cardiac workload, ventricular remodeling, and fluid
overload. Rationale: While short-term RAAS activation preserves perfusion, long-term
exposure to angiotensin II and aldosterone promotes myocardial fibrosis, myocyte hypertrophy,
and progressive heart failure worsening.
Question 8
Question: What laboratory test is the primary biomarker utilized to differentiate dyspnea caused
by acute heart failure from dyspnea caused by pulmonary disease? Answer: B-type Natriuretic
Peptide (BNP) or N-terminal pro-BNP (NT-proBNP). Rationale: Ventricular myocytes secrete
BNP in response to wall stretch and volume overload; levels are markedly elevated in acute heart
failure compared to primary pulmonary disorders like COPD.
Question 9
Question: What life-threatening complication must the nurse monitor for when administering an
ACE inhibitor to a patient with heart failure? Answer: Angioedema and hyperkalemia.
Rationale: ACE inhibitors prevent the degradation of bradykinin, which can lead to rapid
,swelling of the lips, tongue, and larynx (angioedema), and they decrease aldosterone secretion,
predisposing the patient to hyperkalemia.
Question 10
Question: What mechanical circulatory support device is commonly used as a bridge to
transplant or destination therapy for end-stage left ventricular heart failure? Answer: Left
Ventricular Assist Device (LVAD). Rationale: An LVAD is a surgically implanted pump that
takes over the function of the failing left ventricle by pulling blood from the LV and propelling it
into the aorta.
Question 11
Question: What are the classic physical exam findings associated with aortic stenosis? Answer:
A systolic crescendo-decrescendo murmur heard best at the second right intercostal space, a
narrowed pulse pressure, and a delayed, weak carotid pulse (pulsus parvus et tardus). Rationale:
Obstruction of blood flow across the calcified aortic valve during systole creates turbulent flow
and impairs forward stroke volume into the systemic circulation.
Question 12
Question: What diagnostic study is considered the gold standard for confirming infective
endocarditis? Answer: Echocardiography (specifically Transesophageal Echocardiogram, TEE)
combined with positive blood cultures (Duke criteria). Rationale: TEE provides high-resolution
visualization of cardiac valve structures to identify vegetation, abscesses, or valvular perforation.
Question 13
Question: What is the hallmark clinical manifestation of cardiac tamponade known as Beck's
triad? Answer: Hypotension, muffled heart sounds, and jugular venous distension (JVD).
Rationale: Fluid accumulation in the non-compliant pericardial sac restricts ventricular filling,
leading to decreased cardiac output and elevated central venous pressure.
Question 14
Question: What physical sign characterized by an inspiratory drop in systolic blood pressure
greater than 10 mmHg is indicative of cardiac tamponade? Answer: Pulsus paradoxus.
Rationale: During inspiration, increased venous return to the right ventricle shifts the
interventricular septum into the left ventricle, compromising left ventricular filling and systemic
arterial pressure.
Question 15
Question: What is the primary difference in pathophysiology between rheumatic fever and
infective endocarditis? Answer: Rheumatic fever is an autoimmune inflammatory reaction
following a group A beta-hemolytic streptococcal pharyngitis that damages heart valves, whereas
, infective endocarditis is a direct microbial infection of the endothelial surface of the heart.
Rationale: Rheumatic heart disease results from molecular mimicry attacking cardiac tissue,
while endocarditis involves bacterial or fungal colonization forming friable vegetations on heart
valves.
Question 16
Question: What emergent intervention is required when a patient with a permanent pacemaker
exhibits failure to capture? Answer: Placing the patient on transcutaneous pacing pads,
positioning them on their left side, and notifying the cardiologist for generator or lead
adjustment. Navbar/Rationale: Failure to capture occurs when pacemaker spikes are present but
are not followed by myocardial depolarization (P waves or QRS complexes), resulting in loss of
capture and potential hemodynamic collapse.
Question 17
Question: What is the mechanism of action of adenosine in treating paroxysmal supraventricular
tachycardia (PSVT)? Answer: It transiently slows conduction through the atrioventricular (AV)
node and interrupts reentry pathways, restoring normal sinus rhythm. Rationale: Adenosine has
an extremely short half-life (less than 10 seconds) and must be administered via a rapid IV push
close to the central circulation followed by a rapid saline flush.
Question 18
Question: What electrolyte abnormality significantly increases a patient's vulnerability to
digoxin toxicity? Answer: Hypokalemia. Rationale: Potassium and digoxin compete for the
+¿¿
same binding site on the Na+ ¿/K ¿-ATPase pump; low extracellular potassium enhances digoxin
binding, precipitating intracellular toxicity and dangerous arrhythmias.
Question 19
Question: What is the immediate treatment priority for a client presenting in ventricular
fibrillation? Answer: Immediate high-quality cardiopulmonary resuscitation (CPR) followed by
unsynchronized defibrillation as soon as a defibrillator is available. Rationale: Ventricular
fibrillation is a lethal, pulseless rhythm characterized by chaotic electrical activity; prompt
defibrillation is the only effective treatment to restore an organized rhythm.
Question 20
Question: What physical assessment technique is used to evaluate for deep vein thrombosis
(DVT) in the lower extremities, and why is it generally discouraged? Answer: Homan's sign
( dorsiflexion of the foot causing pain in the calf), which is discouraged because vigorous
manipulation can dislodge a thrombus, causing a pulmonary embolism. Rationale: Clinical
evaluation for DVT relies on objective scoring systems (Wells criteria), compression
ultrasonography, and D-dimer testing rather than unreliable and potentially hazardous physical
maneuvers.
