A nurse recognizes that alterations in cardiac output are caused by changes in heart rate, preload, afterload, and contractility. Which interventions are correctly matched to treat the cause of low cardiac output? Select all that apply.
a) Low afterload: administer vasopressor.
b) Low afterload: administer vasodilator.
c) Low right atrial (R
Low afterload: administer vasopressor.
Low afterload: administer vasodilator.
Low right atrial (RA) pressure: administer diuretics.
Low preload: administer fluid bolus.
High preload: administer diuretic or vasodilator.
Correct Answer : D
Choice A reason: Administering a vasopressor is not appropriate for low afterload. Vasopressors are used to increase blood pressure by causing vasoconstriction, which increases afterload. However, the administration of a vasopressor for low afterload is contradictory because the goal for low afterload would be to reduce the strain on the heart, not to increase it.
Choice B reason: Administering a vasodilator for low afterload is not correct. Vasodilators decrease afterload by causing the blood vessels to widen, reducing the resistance the heart has to pump against. Administering a vasodilator to treat low afterload is inappropriate because it would further lower afterload, potentially leading to inadequate perfusion and worsening cardiac output.
Choice C reason: Administering diuretics for low right atrial (RA) pressure is inappropriate. Diuretics help to remove excess fluid from the body, reducing blood volume and venous pressure. However, if a patient has low right atrial pressure, reducing blood volume further with diuretics could exacerbate the issue, leading to decreased cardiac output and poor perfusion.
Choice D reason: Administering a fluid bolus is the correct intervention for low preload. Preload refers to the volume of blood in the ventricles at the end of diastole. If preload is low, administering fluids increases blood volume, which enhances ventricular filling and improves cardiac output. This intervention helps to stabilize hemodynamics and improve overall perfusion.
Choice E reason: Administering a diuretic or vasodilator is the appropriate intervention for high preload. High preload indicates an excess of blood volume returning to the heart, which can strain the cardiac muscle and reduce efficiency. Diuretics help remove excess fluid, while vasodilators decrease venous return and reduce the volume of blood the heart has to handle, thus optimizing cardiac function and output.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Inotropic drugs are used to improve the strength of the heart's contractions and support cardiac output in cases of heart failure or cardiogenic shock. While they may be used as supportive therapy in septic shock to maintain blood pressure and perfusion, they are not the primary treatment.
Choice B reason: Antibiotics are the primary and most crucial therapy for managing septic shock. Septic shock is caused by a severe infection that leads to systemic inflammation and organ dysfunction. Prompt administration of broad-spectrum antibiotics is essential to target the underlying infection and prevent the progression of septic shock. Antibiotic therapy is initiated as soon as possible, often after obtaining blood cultures to identify the causative pathogen.
Choice C reason: Antidysrhythmic drugs are used to manage abnormal heart rhythms, such as atrial fibrillation or ventricular tachycardia. They are not specific to the treatment of septic shock but may be used if the patient develops arrhythmias as a complication of the shock state.
Choice D reason: Beta blockers are used to manage hypertension and certain types of arrhythmias by reducing the heart rate and the workload on the heart. They are not typically used in the acute management of septic shock and may even be contraindicated due to their potential to decrease cardiac output.
Correct Answer is C,D,A,B
Explanation
Choice A reason: Assessing the client's respiratory status is the top priority action. This ensures that any immediate issues with breathing or oxygenation are identified and managed promptly. Respiratory status can quickly deteriorate in patients with heart failure, and addressing this first can be life-saving.
Choice B reason: Drawing blood to assess the patient's serum electrolytes is important to determine any imbalances that need immediate correction. Electrolyte levels can affect heart function and overall stability, so understanding the patient's current status helps guide further treatment.
Choice C reason: Administering the prescribed intravenous furosemide (Lasix) is critical for managing fluid overload in heart failure. Furosemide helps reduce fluid retention and alleviate symptoms such as pulmonary edema, which can improve respiratory status and overall comfort.
Choice D reason: Asking the patient about an advanced directive is important for understanding their wishes and planning care accordingly. However, it is not an immediate priority compared to stabilizing the patient's respiratory status and addressing urgent medical needs.
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