Which of the following is not a cause of high-output heart failure?

Hypertension

Severe anemia

Sepsis

Hyperthyroidism

Answer and Explanation

The Correct Answer is A

A. Hypertension: This is not a cause of high-output heart failure. Hypertension typically leads to low-output heart failure due to increased afterload, which causes the heart to work harder.

B. Severe anemia: Severe anemia causes high-output heart failure because the body compensates for the decreased oxygen-carrying capacity by increasing cardiac output.

C. Sepsis: Sepsis can lead to high-output heart failure as the body attempts to maintain perfusion in the face of widespread vasodilation.

D. Hyperthyroidism: Hyperthyroidism increases metabolic demands, which can cause high-output heart failure as the heart attempts to meet the increased needs.

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Correct Answer is ["15.94"]

Explanation

Convert the ordered dose to mcg/min:

10 mcg/kg/min × 85 kg = 850 mcg/min

Convert the available dose to mcg/mL:

800 mg = 800,000 mcg in 250 mL

Concentration = 800,000 mcg ÷ 250 mL

= 3200 mcg/mL

Calculate the infusion rate:

Infusion rate (mL/hour) = [Desireddose(mcg/min) ÷Concentration(mcg/mL)] ×60 min/hour

Infusion rate = (850 mcg/min ÷ 3200 mcg/mL) × 60 min/hour

= 15.94 mL/hour

The IV pump should be set to infuse at approximately 15.94 mL/hour to deliver the ordered dose of dopamine at 10 mcg/kg/min for a patient weighing 85 kg. This ensures the appropriate therapeutic effect.

A. ST segment elevation B. Q wave C. inverted T wave D. ST segment depression

Correct Answer is A

Explanation

A. ST segment elevation: ST segment elevation is a classic sign of myocardial injury, indicating that a portion of the heart muscle is not receiving enough oxygen and is actively injured.

B. Q wave: A Q wave typically appears later, representing a previous myocardial infarction (necrosis), not acute injury.

C. Inverted T wave: This indicates myocardial ischemia, which is a precursor to injury but not indicative of injury itself.

D. ST segment depression: This is typically associated with ischemia or subendocardial infarction, not full-thickness myocardial injury.

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Which of the following is not a cause of high-output heart failure?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The physician orders dopamine at 10 mcg/kg/min. The pharmacy provides dopamine 800mg in 250 ml of D5W. What is the hourly IV pump rate? The patient weighs 85 kilograms. Order: Dopamine at 10 mcg/kg/min Available: Dopamine 800 mg in 250 mL D5W Patient weight: 85 kg

Correct Answer is ["15.94"]

Explanation

How is injury manifested on the EKG in a patient experiencing a myocardial infarction?

Correct Answer is A

Explanation

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