Which of the following is a common cause of cardiogenic shock?

Anaphylaxis

Hypovolemia

Pulmonary embolism

Myocardial infarction

Answer and Explanation

The Correct Answer is D

D. Myocardial infarction (heart attack) is a common cause of cardiogenic shock. In myocardial infarction, part of the heart muscle becomes ischemic or necrotic due to occlusion of a coronary artery. This leads to impaired cardiac function and reduced cardiac output, resulting in cardiogenic shock. Prompt recognition and treatment of myocardial infarction are crucial to prevent or manage cardiogenic shock.
A. Anaphylaxis is a severe allergic reaction that can lead to systemic vasodilation and distributive shock, but it is not a common cause of cardiogenic shock. In anaphylaxis, the primary mechanism of shock is typically related to widespread vasodilation and increased vascular permeability rather than impaired cardiac function.
B. Hypovolemic shock occurs due to a decrease in intravascular volume, leading to inadequate tissue perfusion. It is not a common cause of cardiogenic shock, as the underlying mechanism is different. In hypovolemic shock, the primary issue is the loss of circulating blood volume, whereas cardiogenic shock involves impaired cardiac function.
C. Pulmonary embolism can lead to acute right heart strain or failure, which may result in hemodynamic instability and shock. However, pulmonary embolism typically causes obstructive shock rather than cardiogenic shock. Obstructive shock occurs when blood flow is obstructed, such as by a pulmonary embolism, leading to reduced cardiac output.

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Correct Answer is C

Explanation

C. Mean arterial pressure (MAP) reflects the average pressure in the arteries during one cardiac cycle and is an important indicator of tissue perfusion. A MAP of 56 mm Hg is below the normal range (typically >60 mm Hg) and may indicate inadequate tissue perfusion. While norepinephrine is commonly used to increase blood pressure and improve tissue perfusion in hypotensive patients, a MAP of 56 mm Hg suggests that the current infusion rate may not be sufficient to maintain adequate perfusion, and adjusting the infusion rate may be warranted.

A. Norepinephrine is a vasopressor medication primarily used to increase blood pressure in patients with hypotension or shock. A low pulmonary artery wedge pressure (PAWP) suggests decreased preload, which may indicate hypovolemia or inadequate fluid resuscitation. In this case, adjusting the norepinephrine infusion rate may not be necessary, but rather addressing the underlying cause of hypovolemia or inadequate preload.

B. Systemic vascular resistance (SVR) represents the resistance the heart must overcome to pump blood into the systemic circulation. An elevated SVR may suggest vasoconstriction, which could be a desired effect of norepinephrine infusion to increase blood pressure. Therefore, an elevated SVR may not necessarily indicate a need to adjust the norepinephrine infusion rate, as it may reflect the medication's intended action.

D. Norepinephrine primarily acts on alpha-adrenergic receptors to increase blood pressure by inducing vasoconstriction. While it may cause reflex bradycardia due to increased systemic vascular resistance, a heart rate of 58 beats/min may be within an acceptable range depending on the patient's clinical condition and baseline heart rate. Therefore, a slow heart rate alone may not necessarily indicate a need to adjust the norepinephrine infusion rate unless it is associated with signs of inadequate tissue perfusion or other concerning symptoms.

A. Give PRN lorazepam (Ativan) and cancel the transfer. B. Obtain an order for restraints as needed and transfer the patient. C. Notify the health care provider and postpone the transfer. D. Inform the receiving nurse and then transfer the patient.

Correct Answer is C

Explanation

C. This allows for the patient's condition to be re-evaluated, ensuring that they receive the necessary care and attention before being transferred.

A. Benzodiazepines can cause sedation, cognitive impairment, and delirium, which may worsen the patient's condition. Canceling the transfer without addressing the underlying cause of confusion may delay appropriate management.

B. Restraints can increase agitation, anxiety, and risk of injury, and they do not address the underlying cause of confusion. Restraints should only be considered as a last resort if all other measures to ensure patient safety have been exhausted.

D. This option is not appropriate because transferring the patient without addressing the new-onset confusion could compromise patient safety. It's essential to identify and manage the underlying cause of confusion before transferring the patient to another unit.

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Which of the following is a common cause of cardiogenic shock?

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Naxlex Comprehensive Predictor Exams

The nurse is caring for a patient receiving a continuous norepinephrine IV infusion. Which finding indicates that the infusion rate may need to be adjusted?

Correct Answer is C

Explanation

An 81-yr-old patient who has been in the intensive care unit (ICU) for a week is now stable and transfer to the progressive care unit is planned. On rounds, the nurse notices that the patient has new onset confusion. What should the nurse plan to do?

Correct Answer is C

Explanation

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