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

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.