The nurse is reviewing the patient’s history and recent lab results. Which of the following findings indicate an increased risk for cardiovascular complications? (Select all that apply)
Mild left ventricular hypertrophy on x-ray
Total cholesterol of 210 mg/dL
Hemoglobin A1C of 7.5%
Sodium level of 138
Creatinine level of 1.6
Oxygen saturation of 95% on room air
Correct Answer : A,B,C,E
Choice A reason: Mild left ventricular hypertrophy indicates cardiac strain from chronic hypertension, increasing risk for heart failure or infarction. It reflects structural change, elevating cardiovascular morbidity as pressure overload progresses, a known precursor to serious events.
Choice B reason: Total cholesterol of 210 mg/dL exceeds optimal (<200 mg/dL), promoting atherosclerosis. Lipid plaques narrow arteries, raising risks for coronary artery disease and stroke, a well-established cardiovascular risk factor needing intervention.
Choice C reason: Hemoglobin A1C of 7.5% shows poor glycemic control (>6.5% is diabetes), damaging vessels via glycation. This accelerates atherosclerosis and microvascular complications, significantly increasing cardiovascular event risk in uncontrolled diabetes.
Choice D reason: Sodium of 138 mEq/L is normal (135-145 mEq/L), not impacting cardiovascular risk directly. It influences fluid balance, but this value doesn’t suggest hypertension or heart strain, making it irrelevant here.
Choice E reason: Creatinine of 1.6 mg/dL (>1.2 mg/dL) signals renal impairment, often from hypertension or diabetes. Kidney dysfunction raises cardiovascular risk by disrupting fluid and pressure regulation, contributing to heart disease progression.
Choice F reason: Oxygen saturation of 95% on room air is normal (95-100%), indicating adequate lung function. It doesn’t suggest hypoxia or cardiovascular compromise, so it’s not a risk factor in this context.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C"]
Explanation
Choice A reason: Oxygen saturation of 92% is low-normal (95-100%), not specific to worsening heart failure acutely. It may reflect chronic lung issues or mild hypoxia, but alone, it’s not a definitive sign of decompensation.
Choice B reason: Bilateral pulmonary congestion on x-ray shows fluid in alveoli from left heart failure, impairing gas exchange. It’s a classic sign of worsening, as rising pressure backs fluid into lungs, causing dyspnea.
Choice C reason: A 5-lb weight gain over days indicates fluid retention, a hallmark of worsening heart failure. It reflects sodium and water buildup from reduced cardiac output, directly correlating with symptom exacerbation.
Choice D reason: BUN of 28 mg/dL (normal 7-20 mg/dL) suggests mild renal stress, possibly from diuretics. It’s not specific to worsening heart failure without symptoms like dyspnea, as it may reflect dehydration instead.
Choice E reason: Potassium of 4.9 mEq/L is normal (3.5-5.0 mEq/L), not indicating worsening heart failure. It may rise with ACE inhibitors, but this value alone doesn’t signal acute decompensation or symptom progression.
Correct Answer is D
Explanation
Choice A reason: Blood pressure of 164/98 mmHg is elevated but not immediately life-threatening in respiratory failure. It may reflect stress or chronic hypertension, less urgent than neurologic changes signaling CO2 narcosis.
Choice B reason: Oxygen saturation of 90% is low but manageable with oxygen therapy in respiratory failure. It’s concerning, yet less critical than somnolence, which indicates severe CO2 retention requiring urgent intervention.
Choice C reason: Weakness is nonspecific in respiratory failure, possibly from hypoxia or fatigue. It’s not as immediately alarming as somnolence, which directly reflects brain suppression from high PaCO2, needing prompt reporting.
Choice D reason: Somnolence and difficulty arousing signal CO2 narcosis from hypercapnia (high PaCO2), a medical emergency. It indicates respiratory acidosis impairing brain function, requiring immediate provider notification for ventilatory support.
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