Question 1

Why you used a defibrillator when the heart stops?

Accepted Answer

Answer reason: Defibrillation delivers a brief, high-energy electrical shock intended to depolarize a critical mass of myocardium and terminate a shockable arrhythmia (ventricular fibrillation or pulseless ventricular tachycardia). This allows the sinoatrial node or another pacemaker focus to re-establish an organized rhythm with effective perfusion. It is not used to directly increase contractility/output or to correct acidosis, and it does not treat asystole/true “flatline” cardiac arrest.
Category reason: The item tests the physiological purpose/mechanism of defibrillation in cardiac arrest and shockable rhythms rather than a nursing process decision or specific patient-care intervention sequence, so it fits foundational cardiovascular science.

Question 2

Hypertension is defined as a blood pressure consistently above?

Accepted Answer

Answer reason: In many nursing and medical exam standards, hypertension is classically defined as a sustained blood pressure of at least 140/90 mmHg. This threshold reflects persistently elevated systolic and/or diastolic pressures associated with increased risk of cardiovascular complications. Values like 120/80 are normal, and 130/85 may be considered high-normal or elevated in some guidelines but is not the traditional diagnostic cutoff in many curricula. Therefore, 140/90 mmHg is the best answer among the options.
Category reason: The item tests a foundational diagnostic threshold for blood pressure classification, which is core cardiovascular physiology/clinical definitions rather than a nursing intervention or prioritization scenario.

Question 3

Heart is located in the?

Accepted Answer

Answer reason: The heart is located in the thoracic cavity (chest), specifically in the mediastinum between the lungs, behind the sternum. It lies superior to the diaphragm and slightly left of the midline, which is why the apical impulse is often palpated on the left chest. The abdomen, neck, and back are not anatomical locations of the heart in normal human anatomy.
Category reason: This is a foundational anatomy/location question about where the heart sits within the body, which aligns best with study of the cardiovascular system rather than nursing interventions or clinical decision-making.

Question 4

Which of the following arteries supply blood to the brain?

Accepted Answer

Answer reason: The brain’s anterior circulation is primarily supplied by the internal carotid arteries, which enter the skull and contribute to the Circle of Willis. In contrast, the coronary arteries supply the heart muscle and the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. The aorta is the main systemic artery but does not directly supply the brain as a named vessel in the way the carotids do (it gives rise to arteries that do). Therefore, the best answer is the carotid artery.
Category reason: This is a foundational anatomy/physiology question about which major arteries supply the brain, which is best categorized under the Cardiovascular System rather than nursing care decision-making.

Question 5

Cardiac output is calculated by the formula?

Accepted Answer

Answer reason: Cardiac output (CO) is the volume of blood pumped by the heart per minute and is calculated as stroke volume (SV) multiplied by heart rate (HR): CO = SV × HR. Stroke volume is the amount of blood ejected with each beat, and heart rate is beats per minute, so their product yields volume per minute. Division or subtraction would not produce the correct units or physiological meaning. Blood pressure is related to CO and systemic vascular resistance (MAP ≈ CO × SVR), not SV directly.
Category reason: This item tests a foundational cardiovascular physiology formula (cardiac output), not a nursing intervention, prioritization, or safety decision; therefore it fits NursingScience under the Cardiovascular System.

Question 6

Blood pressure of a healthy person is?

Accepted Answer

Answer reason: Normal adult blood pressure is commonly taught as approximately 120/80 mmHg (systolic/diastolic). A value like 140/60 reflects elevated systolic pressure with wide pulse pressure and is not considered “healthy normal.” 90/60 can be normal for some individuals but is generally classified as low compared with the standard reference value. 80/120 is incorrect because systolic pressure should be higher than diastolic.
Category reason: This question tests the standard normal blood pressure value, which is foundational cardiovascular physiology and vital-sign norms rather than a nursing intervention or prioritization scenario.

Question 7

Blood pressure is measured in?

Accepted Answer

Answer reason: In clinical practice, blood pressure refers to the pressure within the systemic arteries, most commonly measured noninvasively using a cuff over the brachial artery. Arterial pressure reflects the force generated by ventricular contraction (systolic) and maintained during relaxation (diastolic). Veins operate at much lower pressures and are not the standard site for routine BP measurement, while capillary pressure is not measured with standard BP cuffs. The heart generates the pressure, but BP is defined and measured within arteries.
Category reason: This is a foundational question about where systemic blood pressure is assessed within the circulatory system, which is primarily a cardiovascular physiology/anatomy concept rather than a nursing intervention or prioritization scenario.

Question 8

Normal pulse pressure is about?

Accepted Answer

Answer reason: Pulse pressure is defined as systolic blood pressure minus diastolic blood pressure. With a typical normal blood pressure around 120/80 mmHg, the pulse pressure is approximately 40 mmHg. Values much lower can suggest low stroke volume (e.g., shock), while markedly higher values can be seen with increased arterial stiffness or aortic regurgitation. Therefore, 40 mmHg is the best approximate normal value among the choices.
Category reason: This question tests the physiologic definition and normal value of pulse pressure, a hemodynamic concept within cardiovascular physiology rather than a nursing intervention or prioritization task.

Question 9

What is the largest artery in the human body?

Accepted Answer

Answer reason: The aorta is the largest artery in the body, arising from the left ventricle and distributing oxygenated blood to the systemic circulation. It has the greatest diameter and handles the highest pressures generated by the heart. The pulmonary artery, carotid arteries, and femoral arteries are large vessels but are smaller branches or part of a lower-pressure circuit compared with the aorta.
Category reason: This question tests foundational knowledge of major blood vessel anatomy and the systemic circulation, which is best classified under the Cardiovascular System rather than nursing decision-making.

Question 10

Where does pitting edema usually begin?

Accepted Answer

Answer reason: Pitting edema from systemic fluid retention (e.g., heart failure, venous insufficiency) typically appears first in the most dependent areas due to gravity. In an ambulatory person, this is most commonly the ankles and lower legs. Pressure displaces interstitial fluid, producing a “pit” in these dependent tissues. Facial edema is more characteristic of nephrotic/renal causes and is not the usual starting point for dependent pitting edema.
Category reason: This question tests the typical distribution of dependent (gravity-related) peripheral edema, which is a common clinical manifestation of cardiovascular/venous fluid overload states rather than a nursing intervention decision.

Question 11

A device used to assist or regulate heartbeat is called?

Accepted Answer

Answer reason: A pacemaker is an implanted (or temporary external) device that delivers electrical impulses to stimulate the heart when intrinsic conduction is too slow or irregular. It is used to maintain an adequate heart rate and rhythm in conditions such as symptomatic bradycardia or heart block. A glucometer measures blood glucose, a dialyzer performs hemodialysis for kidney failure, and a ventilator supports breathing—not cardiac pacing.
Category reason: The question tests identification of a device that regulates cardiac rhythm, which is core knowledge of the cardiovascular system rather than a nursing-priority or intervention scenario.

Question 12

ECG test is related to?

Accepted Answer

Answer reason: An ECG (electrocardiogram) records the electrical activity of the heart via electrodes placed on the skin. It is used to assess heart rate, rhythm, conduction abnormalities, and evidence of ischemia/infarction. While chest placement is used, the signal measured reflects cardiac depolarization and repolarization, not lung, kidney, or brain function.
Category reason: This question tests foundational knowledge of what physiologic system an ECG evaluates, which is primarily the cardiovascular (cardiac electrophysiology) system rather than a nursing management/intervention decision.

Question 13

Heartbeat is controlled by?

Accepted Answer

Answer reason: The normal rhythm of the heartbeat is initiated by the heart’s natural pacemaker, the sinoatrial (SA) node, which generates spontaneous electrical impulses. This intrinsic conduction system controls heart rate and rhythm, with autonomic input modulating (speeding or slowing) the rate rather than creating the beat. The brain influences heart rate through sympathetic and parasympathetic pathways, but it does not directly generate the heartbeat. Therefore, “Pacemaker” is the best answer.
Category reason: This question tests foundational knowledge of how cardiac rhythm is generated and regulated (the SA node and conduction system), which is core Cardiovascular System physiology rather than nursing care decision-making.

Question 14

Main reason for Heart Attack is?

Accepted Answer

Answer reason: Most myocardial infarctions are caused by atherosclerotic plaque rupture in a coronary artery with subsequent thrombus formation and acute occlusion. Elevated LDL cholesterol promotes atherosclerosis and plaque development, making it the best answer among the options. Blood sugar (diabetes) is an important risk factor, but it is not the direct primary mechanism compared with cholesterol-driven atherosclerosis. Blood protein and blood urea are not primary causes of heart attack.
Category reason: This question tests the underlying pathophysiologic cause/risk factor for myocardial infarction (coronary atherosclerosis related to cholesterol), which is primarily cardiovascular science knowledge rather than nursing interventions or prioritization.

Question 15

Baroreceptors are located in?

Accepted Answer

Answer reason: High-pressure baroreceptors that regulate short-term blood pressure are located primarily in the carotid sinus and the aortic arch. Among the listed options, the aorta (specifically the aortic arch) is the correct site. These stretch receptors sense changes in arterial wall stretch and adjust heart rate and vascular tone via autonomic reflexes. Skin, lungs, and kidneys are not the principal locations of arterial baroreceptors.
Category reason: This question tests foundational physiology/anatomy of blood pressure regulation and the location of arterial baroreceptors, which is primarily a Cardiovascular System concept rather than a nursing intervention or prioritization scenario.

Question 16

The sphygmomanometer is used to measure?

Accepted Answer

Answer reason: A sphygmomanometer is the cuff-and-gauge device used to measure arterial blood pressure, yielding systolic and diastolic values (mmHg). It works by occluding arterial flow and then detecting return of flow as cuff pressure is released. It does not measure blood glucose, pulse rate directly (though pulse can be palpated/auscultated during measurement), or blood group.
Category reason: The question tests knowledge of a common cardiovascular assessment instrument and what physiologic parameter it measures, which fits best under the Cardiovascular System rather than nursing judgment or care prioritization.

Question 17

Which of the following symptoms is not related to heart attack?

Accepted Answer

Answer reason: Classic myocardial infarction symptoms include chest pain/pressure, diaphoresis, nausea/vomiting, and pain radiating to the arm/shoulder or jaw due to referred cardiac pain pathways. Tingling or discomfort in the arm can accompany this radiation. Isolated leg pain is not a typical presenting symptom of acute coronary syndrome and more often suggests peripheral vascular or musculoskeletal causes. Therefore, among the options, leg pain is least related to a heart attack presentation.
Category reason: The item tests recognition of typical vs atypical symptoms of myocardial infarction, which is foundational knowledge about cardiovascular disease presentation rather than a nursing management/prioritization scenario.

Question 18

The doctor who specializes in diagnosing and treating disorders of the heart and blood vessels is called?

Accepted Answer

Answer reason: A cardiologist is a physician specializing in diseases of the heart and the vascular system, including diagnosis and medical management of conditions such as coronary artery disease, heart failure, and arrhythmias. A gynecologist focuses on the female reproductive system, a hematologist on blood disorders, and a nephrologist on kidney diseases. Therefore, the specialty that addresses heart and blood vessel disorders is cardiology.
Category reason: This question tests recognition of the medical specialty associated with the heart and blood vessels, which is core content within the Cardiovascular System subject area rather than a nursing intervention or prioritization scenario.

Question 19

What is called the "second heart" in our body?

Accepted Answer

Answer reason: The calf muscles are often called the "second heart" because their rhythmic contraction during walking squeezes the deep veins of the lower leg and propels venous blood back toward the heart via one-way venous valves. This "calf muscle pump" is crucial for venous return against gravity, especially in upright posture. Reduced calf muscle activity (immobility) impairs venous return and increases risk of venous stasis and thrombosis. The liver and lungs do not serve this mechanical pumping function for systemic venous return.
Category reason: This question tests foundational physiology of venous return and the role of the skeletal muscle pump, which fits best under the Cardiovascular System.

Question 20

One of the simplest and fastest tests used to evaluate heart function is?

Accepted Answer

Answer reason: An electrocardiogram (ECG/EKG) is a quick, noninvasive, widely available bedside test that rapidly evaluates cardiac electrical activity, rhythm, and ischemic changes. PET and MRI can assess cardiac function but are more complex, time-consuming, and resource-intensive. A total blood profile is not a direct, rapid functional test of the heart, though labs can support cardiac evaluation.
Category reason: The item asks for a basic diagnostic test used to evaluate heart function, which is foundational knowledge about cardiovascular assessment rather than a nursing intervention or prioritization scenario.

Question 21

Blood pressure 180/90....?

Accepted Answer

Answer reason: A blood pressure of 180/90 mmHg is markedly elevated, with a systolic value in the hypertensive crisis range (≥180 mmHg). Normal adult blood pressure is generally

Question 22

Myocarditis is a disorder of?

Accepted Answer

Answer reason: Myocarditis refers to inflammation of the myocardium, which is the muscular layer of the heart wall. Because it directly affects heart muscle, it can impair contractility and lead to arrhythmias or heart failure. Therefore, myocarditis is a disorder of the heart, not the brain, lungs, or skin.
Category reason: This question tests recognition of the organ system involved in myocarditis (inflammation of heart muscle), which is foundational knowledge within the Cardiovascular System.

Question 23

Which artery supplies oxygenated blood to the heart muscle itself?

Accepted Answer

Answer reason: The myocardium (heart muscle) receives its oxygenated blood supply from the coronary arteries, which branch off the aorta just above the aortic valve. The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, not to the heart muscle. The aorta is the main systemic outflow vessel but does not directly perfuse the myocardium except via its coronary branches. The carotid arteries supply the head and brain rather than the heart muscle.
Category reason: This question tests foundational knowledge of cardiac blood supply and major vessels, which is primarily anatomy/physiology of circulation within the cardiovascular system rather than a nursing intervention or clinical judgment scenario.

Question 24

Blood pressure is highest in?

Accepted Answer

Answer reason: Blood pressure is highest in the arteries, particularly the aorta and large arteries, because they receive blood directly from ventricular systole. As blood flows away from the heart through arterioles and into capillaries, resistance and distance from the pumping source cause a progressive drop in pressure. Venules and veins are low-pressure, high-capacitance vessels that return blood to the heart, so their pressures are much lower than arterial pressure.
Category reason: This question tests foundational knowledge of pressure changes across the vascular tree (arteries → arterioles → capillaries → venules → veins), which is a core concept in cardiovascular physiology rather than a nursing intervention scenario.

Question 25

Failure of the Foramen Ovale to close will cause what Congenital Heart Disease?

Accepted Answer

Answer reason: The foramen ovale is a fetal communication between the right and left atria that normally functionally closes after birth as left atrial pressure rises. Failure to close results in persistent interatrial flow, which is classically categorized as an atrial septal defect (often a patent foramen ovale or secundum-type ASD conceptually). Patent ductus arteriosus instead involves failure of the ductus arteriosus (between pulmonary artery and aorta) to close. Transposition of the great arteries and pulmonary stenosis are unrelated to foramen ovale closure failure.
Category reason: This question tests congenital cardiac anatomy/physiology and the structural consequence of a fetal shunt failing to close, which is foundational cardiovascular system knowledge rather than a nursing care decision.

Question 26

Which ECG finding suggests hyperkalemia?

Accepted Answer

Answer reason: Hyperkalemia classically causes tall, narrow, peaked T waves early on due to altered myocardial repolarization. As potassium rises further, additional changes may include PR prolongation, QRS widening, and eventual sine-wave patterns. In contrast, U waves are more typical of hypokalemia, and ST elevation suggests acute myocardial injury rather than an electrolyte disturbance. A short PR interval is associated with pre-excitation syndromes (e.g., WPW), not hyperkalemia.
Category reason: This question tests recognition of ECG changes caused by an electrolyte abnormality, which is foundational cardiovascular science knowledge rather than a nursing intervention or prioritization scenario.

Question 27

If a client develops cor pulmonale (right-sided heart failure), the nurse would expect to observe?

Accepted Answer

Answer reason: Cor pulmonale is right-sided heart failure due to pulmonary hypertension, causing systemic venous congestion. Venous congestion leads to dependent peripheral edema and fluid accumulation in the abdomen (ascites). The other options are more consistent with primary lung infection/airway inflammation or nonspecific respiratory distress rather than the hallmark systemic fluid retention of right-sided failure.
Category reason: The item tests knowledge of the physiologic consequences and clinical manifestations of right-sided heart failure, which is primarily cardiovascular pathophysiology rather than a nursing intervention/prioritization scenario.

Question 28

Which of the following chambers of the heart has the thickest myocardium?

Accepted Answer

Answer reason: The left ventricle has the thickest myocardium because it must generate the highest pressure to eject blood into the systemic circulation via the aorta. Systemic vascular resistance is much greater than pulmonary vascular resistance, so the left ventricle requires more muscular wall thickness than the right ventricle. The atria primarily serve as low-pressure receiving and filling chambers, so they have thinner walls.
Category reason: This item tests foundational cardiovascular anatomy/physiology knowledge about relative chamber wall thickness and the pressure demands of systemic vs pulmonary circulation, which fits the Cardiovascular System subject rather than nursing care decisions.

Question 29

What is the function of the chordae tendineae in the heart?

Accepted Answer

Answer reason: Chordae tendineae are fibrous cords that anchor the atrioventricular (mitral and tricuspid) valve leaflets to papillary muscles. During ventricular systole they prevent the valve leaflets from prolapsing back into the atria, thereby preventing regurgitation (backflow) into the atria. They do not generate electrical impulses (SA/AV node), do not control semilunar valve opening (aortic/pulmonic), and do not transport blood.
Category reason: This question tests structural function of a specific cardiac anatomy (chordae tendineae) and its role in valve mechanics, which is core cardiovascular system foundational science rather than a nursing intervention or prioritization scenario.

Question 30

The largest vein in the human body is?

Accepted Answer

Answer reason: The inferior vena cava is the largest vein in the body and returns deoxygenated blood from the lower extremities, pelvis, and abdomen to the right atrium. By caliber and volume of blood carried, it exceeds regional veins such as the jugular, renal, and hepatic veins. The superior vena cava is also large, but the inferior vena cava is generally larger and longer.
Category reason: This is a foundational anatomy/physiology question about major venous vessels and systemic venous return, which falls under the Cardiovascular System rather than nursing interventions or clinical judgment.

Question 31

Which organ is responsible for pumping blood throughout the body?

Accepted Answer

Answer reason: The heart is a muscular pump that generates the pressure needed to circulate blood through systemic and pulmonary circuits. Its rhythmic contractions (systole and diastole) propel blood to all tissues for oxygen and nutrient delivery and return blood for re-oxygenation. The brain, liver, and lungs have vital functions but do not serve as the primary pump for whole-body circulation.
Category reason: This question tests basic organ function in circulation—identifying the organ responsible for pumping blood—so it fits foundational cardiovascular system knowledge rather than nursing judgment or interventions.

Question 32

What is the normal range of central venous pressure (CVP)?

Accepted Answer

Answer reason: Normal CVP reflects right atrial pressure and venous return/intravascular volume status. The commonly accepted normal range is about 2–6 mmHg, which corresponds to approximately 5–10 cm H2O when measured with a water manometer. Values below this suggest low preload/hypovolemia, while higher values suggest fluid overload, right heart dysfunction, or increased intrathoracic pressure. Therefore, 5–10 cm H2O is the best answer among the options.
Category reason: This item tests normal hemodynamic measurement values (CVP) and their physiologic meaning in the circulatory system, which is primarily foundational cardiovascular science rather than a nursing intervention or prioritization scenario.

Question 33

Which chamber of the heart pumps oxygenated blood to the body?

Accepted Answer

Answer reason: The left ventricle ejects oxygenated blood into the systemic circulation through the aorta, providing perfusion to the entire body. The left atrium only receives oxygenated blood from the pulmonary veins and transfers it to the left ventricle. The right-sided chambers handle deoxygenated blood destined for the lungs (pulmonary circulation). Therefore, the chamber that pumps oxygenated blood to the body is the left ventricle.
Category reason: This question tests foundational knowledge of cardiac anatomy and the direction of blood flow in systemic versus pulmonary circulation, which is part of the Cardiovascular System in nursing science.

Question 34

Which is the most powerful organ in the body?

Accepted Answer

Answer reason: Among the listed organs, the heart is typically considered the most powerful because it generates continuous rhythmic force to pump blood through the entire circulatory system. This mechanical workload is sustained without rest across the lifespan and is essential for perfusion and oxygen delivery to all tissues. While liver, skin, and kidneys are vital for metabolism, protection, and filtration, they do not perform the same constant high-force pump function as the heart.
Category reason: This item tests foundational knowledge about organ function and relative physiologic role, not nursing interventions or clinical decision-making, so it fits NursingScience. The concept centers on the heart’s pumping function within the cardiovascular system.

Question 35

Which organ is called the “River of life”?

Accepted Answer

Answer reason: Blood is commonly referred to as the “river of life” because it continuously circulates through the body, delivering oxygen, nutrients, and hormones while removing carbon dioxide and metabolic wastes. This constant flow maintains tissue perfusion, supports immunity via circulating leukocytes, and enables hemostasis through platelets and clotting factors. Lymph is important for fluid balance and immune function, but it is not typically termed the “river of life,” and the heart/brain are organs rather than the circulating medium implied by the phrase.
Category reason: This is a foundational question about a key component of the circulatory system and its physiologic role rather than a nursing intervention or clinical decision, so it fits NursingScience under the Cardiovascular System.

Question 36

Which of the following characteristics is typical of the pain associated with DVT?

Accepted Answer

Answer reason: Deep vein thrombosis (DVT) classically causes a gradual-onset, deep, aching pain in the affected limb, often with tenderness, swelling, and warmth. “No pain” is incorrect because DVT commonly produces discomfort, even though it can occasionally be asymptomatic. “Sudden onset” is more typical of acute arterial occlusion or ischemia, which presents abruptly and can be severe. “Tingling” suggests neuropathic symptoms rather than venous thrombosis pain.
Category reason: The question tests recognition of typical symptom patterns of a cardiovascular condition (DVT) rather than a nursing intervention or prioritization decision, so it best fits foundational cardiovascular pathophysiology knowledge.

Question 37

Increase in heart rate?

Accepted Answer

Answer reason: An increased heart rate is termed tachycardia (typically >100 beats/min in adults). Bradycardia refers to a decreased heart rate, while hypotension and hypertension describe low and high blood pressure, respectively. Therefore, the correct term for increased heart rate is tachycardia.
Category reason: This question tests basic cardiovascular terminology/physiology (definitions of heart rate and related terms) rather than a nursing intervention or clinical decision, so it fits NursingScience under the Cardiovascular System.

Question 38

Blood pressure is measured in units of?

Accepted Answer

Answer reason: Blood pressure is a pressure measurement and is conventionally expressed in millimeters of mercury (mm Hg), reflecting the height of a mercury column in a manometer. L/min measures flow (e.g., cardiac output), beats per minute measures heart rate, and degrees Fahrenheit measures temperature. Therefore, mm Hg is the correct unit for blood pressure.
Category reason: This question tests foundational knowledge of cardiovascular measurement units (blood pressure), which fits best under the Cardiovascular System rather than nursing care decision-making.

Question 39

The normal heartbeat of human heart is?

Accepted Answer

Answer reason: Normal resting heart rate in a healthy adult is typically 60–100 beats/min, with an average around 70–80 beats/min. Among the options provided, 70–80/min best matches the commonly cited average resting rate. 50–60/min can be normal in well-trained athletes but is not the typical average for the general adult population. 90–100/min is at the upper end of normal, and 110–120/min is generally tachycardia at rest for adults.
Category reason: This item tests foundational knowledge of normal adult heart rate ranges (vital sign physiology) rather than nursing interventions or clinical prioritization, aligning best with the Cardiovascular System subject.

Question 40

A patient presents with chest pain. ECG shows ST elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?

Accepted Answer

Answer reason: ST elevation in leads II, III, and aVF localizes an inferior wall myocardial infarction. The inferior wall is most commonly supplied by the right coronary artery (via the posterior descending artery) in right-dominant circulation, which is the most frequent pattern. LAD occlusion typically causes anterior/septal changes (V1–V4), and LCx more often causes lateral (I, aVL, V5–V6) or posterior involvement. Therefore, the most likely culprit vessel is the right coronary artery.
Category reason: This item tests ECG lead localization to myocardial territory and the corresponding coronary artery supply, which is foundational cardiovascular anatomy/physiology knowledge rather than a nursing intervention or prioritization scenario.

Question 41

Normal Systolic Blood Pressure?

Accepted Answer

Answer reason: Normal adult systolic blood pressure is generally considered to be below 120 mmHg, with typical normal values around 90–120 mmHg. Values of 120–139 mmHg fall into elevated or prehypertension ranges (depending on guideline), not strictly normal. Readings of 140 mmHg or higher meet criteria for hypertension and therefore are not normal. Thus, 90–120 mmHg is the best match for normal systolic BP among the options.
Category reason: This question tests a normal physiologic cardiovascular parameter (systolic blood pressure ranges), which is foundational knowledge of the cardiovascular system rather than a nursing intervention or prioritization decision.

Question 42

Which blood vessel carries blood from the kidney to the heart is the?

Accepted Answer

Answer reason: Blood exits the kidneys via the renal veins, which drain directly into the inferior vena cava and then return blood to the right atrium of the heart. The pulmonary artery carries blood from the heart to the lungs, not from the kidneys. The hepatic artery supplies the liver, and the iliac veins primarily drain the lower limbs and pelvis rather than serving as the main outflow vessel from the kidneys.
Category reason: This question tests foundational anatomy of systemic venous return from the kidneys to the heart, which falls under cardiovascular system knowledge rather than nursing interventions or clinical judgment.

Question 43

Which Organ has dual blood supply?

Accepted Answer

Answer reason: The liver has a classic dual blood supply: oxygenated blood from the hepatic artery and nutrient-rich venous blood from the portal vein. Both sources enter the liver and mix in hepatic sinusoids before draining via hepatic veins into the inferior vena cava. This dual inflow is a key anatomical and physiological feature of hepatic circulation and is more definitive than the other listed organs in standard teaching.
Category reason: The question tests foundational knowledge of organ vascular anatomy/physiology (dual inflow to an organ), which is primarily covered under cardiovascular anatomy and physiology rather than nursing interventions or clinical decision-making.

Question 44

Which of the following is the most effective lifestyle change to reduce blood pressure?

Accepted Answer

Answer reason: Weight loss is one of the most effective lifestyle interventions for lowering blood pressure, especially in people who are overweight or obese, with reductions that are often clinically significant and sustained when maintained. Excess adiposity increases sympathetic activity, RAAS activation, and vascular resistance, all of which raise blood pressure. While increasing potassium can help (particularly with lower sodium intake), and reducing caffeine or moderate wine intake may have smaller or inconsistent effects, weight loss has the strongest overall impact among these options.
Category reason: This question tests foundational knowledge of nonpharmacologic management of hypertension and its physiologic effects on the cardiovascular system rather than a bedside nursing decision or prioritization task.

Question 45

Which one of the following is the normal range of diastolic pressure?

Accepted Answer

Answer reason: Normal adult diastolic blood pressure is typically around 60–80 mmHg, and many nursing references accept up to about 90 mmHg as the upper limit of normal. Among the options, 70–90 mmHg best matches this accepted normal range. The other options are either too low (40–50 mmHg suggests hypotension) or represent systolic/abnormally high ranges (100–130 or 110–145 mmHg).
Category reason: The question tests foundational knowledge of normal blood pressure values, which is a core concept of cardiovascular physiology rather than a nursing intervention or prioritization scenario.

Question 46

The normal pacemaker of the heart is?

Accepted Answer

Answer reason: The sinoatrial (SA) node is the heart’s normal pacemaker because it has the highest intrinsic rate of spontaneous depolarization and initiates each heartbeat. Its impulses spread through the atria and then to the AV node for conduction to the ventricles. While the AV node, Bundle of His, and Purkinje fibers can generate escape rhythms, their intrinsic firing rates are slower than the SA node.
Category reason: This question tests foundational knowledge of the cardiac conduction system and which structure initiates normal rhythm, which is core Cardiovascular System physiology rather than a nursing intervention or safety judgment.

Question 47

Pulmonary trunk divide into left and right ____.

Accepted Answer

Answer reason: The pulmonary trunk arises from the right ventricle and carries deoxygenated blood toward the lungs. It bifurcates into the right and left pulmonary arteries, each supplying the corresponding lung. The other listed arteries are systemic vessels (carotid to head/neck, iliac to pelvis/lower limb, brachial to upper limb) and are not branches of the pulmonary trunk.
Category reason: This is a factual question about cardiac great-vessel anatomy (branching of the pulmonary trunk), which is core content of the Cardiovascular System rather than nursing interventions or clinical judgment.

Question 48

What is the pacemaker of the heart?

Accepted Answer

Answer reason: The sinoatrial (SA) node is the heart’s primary pacemaker because it has the highest intrinsic rate of spontaneous depolarization and normally initiates each heartbeat. Its impulses spread through the atria and then reach the AV node, which provides physiologic conduction delay before ventricular activation. The AV node, Bundle of His, and Purkinje fibers can act as secondary pacemakers, but at slower intrinsic rates than the SA node.
Category reason: This question tests foundational knowledge of the cardiac conduction system and which structure initiates normal cardiac rhythm, which is core cardiovascular physiology/anatomy rather than a nursing intervention scenario.

Question 49

Pacemaker of the heart is?

Accepted Answer

Answer reason: The sinoatrial (SA) node is the heart’s primary pacemaker because it has the highest intrinsic rate of spontaneous depolarization, initiating each normal heartbeat. Its impulses spread through the atria to the atrioventricular (AV) node, which primarily delays conduction rather than setting the normal rhythm. The Bundle of His and Purkinje fibers are conduction pathways that transmit impulses to the ventricles and serve as slower backup pacemakers if higher pacemakers fail.
Category reason: This item tests foundational knowledge of the cardiac conduction system and which structure initiates normal electrical impulses, a core topic in the Cardiovascular System.

Question 50

Cardiac myopathy is a medical condition related to ____.?

Accepted Answer

Answer reason: Cardiomyopathy (sometimes phrased as “cardiac myopathy”) refers to diseases of the heart muscle (myocardium) that alter the heart’s structure and/or function. This can lead to impaired pumping (systolic or diastolic dysfunction), heart failure symptoms, and arrhythmias. The other options describe unrelated organs or functions and are not the primary site of pathology in cardiomyopathy.
Category reason: This question tests foundational knowledge about what body system and organ is affected by cardiomyopathy, which is core Cardiovascular System content rather than a nursing intervention or care-priority scenario.

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