Question 1

An older patient is being evaluated for a cardiac click audible upon auscultation.Which age-related change should the nurse realize might be causing this heart sound?

Accepted Answer

Valve stenosis is an age-related change in which the valves in the heart become thickened and calcified, leading to a clicking or murmuring sound upon auscultation. Hypertension, atrial fibrillation, and congestive heart failure may also be seen in older adults but are not directly related to the development of a cardiac click sound.

Question 2

The nurse is reviewing data collected during the assessment of an older patient.Which finding should the nurse consider as being an age-related change of the cardiovascular system?

Accepted Answer

As people age, the arteries can become stiffer, leading to increased blood pressure, which is a common age-related change in the cardiovascular system.

Question 3

A patient with a blood pressure of 88/50 mm Hg has a heart rate of 112 beats per minute.Which mechanism should the nurse realize is occurring in this patient?

Accepted Answer

A heart rate of 112 beats per minute indicates a positive chronotropic effect, which means an increase in heart rate due to an increase in sympathetic activity or a decrease in parasympathetic activity. The low blood pressure may be a result of the increased heart rate, which reduces the amount of time for the ventricles to fill with blood, resulting in a decrease in stroke volume and cardiac output. The force of the mechanical contraction and reaction to ventricular volume at the end of diastole may also contribute to blood pressure regulation, but are not the primary mechanisms at work in this situation.

Question 4

After palpating a patient's radial pulses,the nurse proceeds to palpate the brachial,carotid,femoral,popliteal,and posterior tibial pulses.What condition caused the nurse to make this more thorough physical assessment?

Accepted Answer

Various skin temperatures can indicate poor circulation or vascular issues, prompting the nurse to assess all major pulses to evaluate blood flow throughout the body.

Question 5

The nurse is reviewing the anatomy of the heart with a patient scheduled for cardiac surgery.Which patient statement indicates additional teaching is required?

Accepted Answer

The correct statement is that blood leaves the right ventricle and travels through the pulmonary artery to the lungs, not the pulmonary vein. The pulmonary veins are responsible for bringing oxygenated blood back to the left atrium from the lungs, not carrying blood from the right ventricle to the lungs.

Question 6

The nurse notes that an older patient's point of maximum impulse is displaced to the left.What age-related change should the nurse suspect as causing this assessment finding?

Accepted Answer

Left ventricular atrophy is an age-related change that can cause the point of maximum impulse to be displaced to the left. Valvular stenosis, arterial wall narrowing, and fibrosis of heart chambers are not typically associated with this finding.

Question 7

A patient is scheduled for a transesophageal echocardiogram (TEE).What information should the nurse expect to be provided from this test?

Accepted Answer

A transesophageal echocardiogram (TEE) is a test that uses high-frequency sound waves (ultrasound) to create pictures of the heart. It can provide information about the presence of clots in the atria, which can be a risk for stroke or other complications. The other options (A, B, and C) are typically obtained through other diagnostic tests.

Question 8

A patient's blood pressure is 174/98 mm Hg.Which aspect of cardiac output is most affected by this elevated reading?

Accepted Answer

Afterload is the pressure the heart must work against in order to eject blood from the left ventricle. In this case, the elevated blood pressure represents an increased afterload, making it harder for the heart to push blood out into the circulation.

Question 9

The nurse notes that a patient is scheduled for a brain natriuretic peptide level to be drawn.What patient teaching should the nurse prepare for this patient?

Accepted Answer

Brain natriuretic peptide (BNP) is a hormone produced by the heart that helps regulate blood pressure and fluid balance. Elevated levels of BNP are associated with heart failure, so patient teaching should focus on signs and symptoms of heart failure to monitor for post-procedure.

Question 10

The nurse is preparing to auscultate the heart sounds of a patient with mitral valve regurgitation.Which sound should the nurse expect to hear?

Accepted Answer

Mitral valve regurgitation results in a murmur, due to blood flowing backward through the mitral valve during systole. A rub, click, or atrial gallop are not commonly associated with this condition.

Question 11

A patient is being assessed for heart disease.For which laboratory test should the nurse instruct to avoid eating and drinking fluids for 12 hours?

Accepted Answer

The lipid panel test measures cholesterol and triglyceride levels in the blood, and is typically done after a 12-hour fast to get accurate results.

Question 12

A patient's QRS complex is becoming increasingly wider.What is occurring within the heart muscle that is reflected on this tracing?

Accepted Answer

An increasingly wider QRS complex indicates a prolonged ventricular depolarization, which may be caused by abnormalities in the conduction system or underlying heart disease.

Question 13

The nurse suspects that a patient is experiencing a release of norepinephrine from the adrenal medulla.Which assessment finding did the nurse use to make this clinical decision?

Accepted Answer

An increase in heart rate to 120 beats per minute is indicative of a release of norepinephrine from the adrenal medulla, as norepinephrine is a sympathomimetic neurotransmitter that increases heart rate. The other options do not necessarily indicate a release of norepinephrine. A low blood pressure can be caused by many factors, and a heart rate within normal limits may not necessarily indicate a release of norepinephrine. A high blood pressure could indicate a release of norepinephrine, but this is not always the case as other factors can also cause hypertension.

Question 14

The nurse is preparing teaching about the coronary arteries for a group of patients scheduled for heart surgery.Which information should the nurse include in this teaching?

Accepted Answer

The coronary arteries originate in the cusps of the aortic valve, which is the correct information that should be included in teaching about the coronary arteries. Option B and D are incorrect as the coronary arteries do not prevent backflow of blood into the atria or ventricles, respectively. Option C is also incorrect as the coronary arteries do not respond to changes in pressure within the heart.

Question 15

A patient is recovering from a cardiac catheterization.For which finding should the nurse notify the health-care provider?

Accepted Answer

Hematoma formation at the puncture site after a cardiac catheterization can be an indication of bleeding and should be reported immediately to the healthcare provider. It is important to monitor the puncture site frequently for any signs of hematoma formation or excessive bleeding. A warm right foot is not necessarily concerning as it could be a result of the patient's positioning during the procedure. Urine output of 250 mL/2 hours is within normal range for post-catheterization recovery. Discomfort lying flat for six hours is also a common side effect and can be managed with pain medication.

Question 16

While auscultating a patient's heart rate the nurse hears scratching sounds.What is most likely causing this sound?

Accepted Answer

The scratching sounds heard during auscultation are likely due to a low level of fluid in the pericardial cavity, which can cause the pericardial layers to rub against each other, producing a friction rub sound.

Question 17

The nurse notes that a patient has bilateral lower extremity edema.For which health problem should the nurse assess further?

Accepted Answer

Bilateral lower extremity edema is a common sign of venous insufficiency, which is caused by impaired blood flow through the veins. It may also indicate heart failure, but since no other symptoms are mentioned, it may be more likely due to venous insufficiency. The other options, pericarditis and cardiac tamponade involve the heart and would not typically present with bilateral edema. Lymph obstruction is less common than venous insufficiency as a cause of bilateral lower extremity edema.

Question 18

A patient is prescribed to have capillary blood glucose readings every four hours.What should the nurse include when explaining capillaries to the patient?

Accepted Answer

Capillaries are where the exchange of gases and nutrients occurs between the blood and tissues, making it the site where the real work of the vascular system occurs. Option A is not entirely accurate as capillaries are still a part of the broader vasculature and may have some pressure involved. Option B is incorrect as capillaries are actually the smallest vessel in the arterial system, not the largest. Option D is true, but not essential to explaining capillaries to the patient in this scenario.

Question 19

The nurse notes that a patient has a low serum potassium level.Which phase of the cardiac action potential will be most affected by this blood level?

Accepted Answer

Phase 3 of the cardiac action potential is the repolarization phase, which is largely dependent on the efflux of potassium ions from the cell. Therefore, a low serum potassium level would affect this phase the most by reducing the amount of potassium ions available for repolarization.

Question 20

The nurse is preparing to determine a patient's cardiac output.Which measurement should be used for preload?

Accepted Answer

Preload refers to the amount of blood that fills the heart before it contracts. The most accurate way to measure preload is by determining the central venous pressure (CVP), which reflects the pressure in the patient's vena cava, the large vein that returns blood to the heart from the body. The other options listed do not directly measure preload.

Quiz 28: Assessment of Cardiovascular Function