A nurse in a cardiac care unit is caring for a client with acute right-sided heart failure. Which of the following findings should the nurse expect?
Increased pulmonary artery wedge pressure (PAWP).
Elevated central venous pressure (CVP).
Decreased brain natriuretic peptide (BNP).
Decreased specific gravity
The Correct Answer is B
Right-sided heart failure is a condition in which the right ventricle fails to pump blood effectively to the lungs, causing a backup of blood in the systemic circulation. This leads to increased pressure in the right atrium and the vena cava, which can be measured by the central venous pressure (CVP). A normal CVP is 2 to 6 mm Hg, but in right-sided heart failure, it can rise above 10 mm Hg. Symptoms of right-sided heart failure include peripheral edema, jugular venous distension, hepatomegaly, ascites, and weight gain.
a. Increased pulmonary artery wedge pressure (PAWP). This statement is incorrect because it describes a finding of left-sided heart failure, not right-sided heart failure. Left-sided heart failure is a condition in which the left ventricle fails to pump blood effectively to the systemic circulation, causing a backup of blood in the pulmonary circulation. This leads to increased pressure in the left atrium and the pulmonary capillaries, which can be measured by the pulmonary artery wedge pressure (PAWP). A normal PAWP is 6 to 12 mm Hg, but in left-sided heart failure, it can rise above 18 mm Hg. Symptoms of left-sided heart failure include dyspnea, orthopnea, paroxysmal nocturnal dyspnea, crackles in the lungs, and pink frothy sputum.
c. Decreased brain natriuretic peptide (BNP). This statement is incorrect because it describes a finding of normal or reduced cardiac function, not heart failure. Brain natriuretic peptide (BNP) is a hormone secreted by the cardiac cells in response to increased stretch and pressure in the ventricles. It acts as a diuretic and a vasodilator, lowering blood volume and blood pressure. BNP is used as a biomarker for diagnosing and monitoring heart failure, as it reflects the degree of ventricular dysfunction. A normal BNP level is less than 100 pg/mL, but in heart failure, it can rise above 400 pg/mL.
d. Decreased specific gravity. This statement is incorrect because it describes a finding of dilute urine, not concentrated urine. Specific gravity is a measure of the concentration of solutes in urine, reflecting the ability of the kidneys to regulate fluid balance. A normal specific gravity is 1.005 to 1.030, but it can vary depending on fluid intake and output, hydration status, and renal function. In right-sided heart failure, fluid retention and reduced renal perfusion can cause oliguria and increased specific gravity of urine.
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Correct Answer is C
Explanation
- A hemorrhagic stroke is a type of stroke that occurs when a blood vessel in the brain ruptures and bleeds into the surrounding tissue. A common cause of hemorrhagic stroke is a cerebral aneurysm, which is a weak or bulging spot in an artery wall. When an aneurysm ruptures, it causes sudden and severe bleeding in the brain, which can damage brain cells and increase intracranial pressure. Symptoms of a hemorrhagic stroke include a sudden and severe headache, often described as "the worst headache of my life", followed by neurologic deficits, such as weakness, numbness, vision loss, speech problems, confusion, or loss of consciousness
- The other options are not correct because:
- History of neurologic deficits lasting less than 1 hr. This statement is incorrect because it describes a transient ischemic atack (TIA), which is a temporary interruption of blood flow to the brain that causes brief neurologic symptoms that resolve within 24 hours. A TIA is often a warning sign of an impending ischemic stroke, which is a type of stroke that occurs when a blood clot blocks an artery in the brain and reduces blood flow to the affected area.
- Maintains consciousness. This statement is incorrect because most clients with hemorrhagic stroke lose consciousness or have altered mental status due to the increased intracranial pressure and brain damage caused by the bleeding. The level of consciousness depends on the location and extent of the hemorrhage, but it usually deteriorates rapidly.
- Gradual onset of several hours. This statement is incorrect because hemorrhagic stroke usually has a sudden onset, unlike ischemic stroke, which may have a gradual onset over several hours or days. The onset of hemorrhagic stroke is often associated with physical exertion, emotional stress, or hypertension, which can increase the risk of aneurysm rupture.
Correct Answer is B
Explanation
Frothy sputum is a sign of left-sided heart failure, due to the pulmonary congestion and impaired gas exchange. The sputum may be pink-tinged or blood-streaked, indicating pulmonary edema.
a. Dependent edema is more likely to be seen in clients who have right-sided heart failure, due to the increased venous pressure and fluid retention. The edema is usually symmetrical and affects the lower extremities, abdomen, and sometimes the face.
c. Nocturnal polyuria is not a specific finding of left-sided heart failure, but it may occur in clients who have renal impairment, diabetes mellitus, or diuretic therapy.
d. Jugular distention is another sign of right-sided heart failure, due to the increased central venous pressure and backward flow of blood into the superior vena cava. It is visible as a bulging of the neck veins, especially when the client is in a semi-Fowler's position.
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