What is the main hemodynamic parameter that measures preload?
Systolic Blood Pressure.
Mean Arterial Blood Pressure.
Central Venous Pressure (CVP).
Systemic Vascular Resistance.
The Correct Answer is C
Choice A reason: Systolic Blood Pressure is not a direct measure of preload; it indicates the pressure in the arteries during the contraction of the heart muscles.
Choice B reason: Mean Arterial Blood Pressure is an average blood pressure in an individual during a single cardiac cycle, but it does not specifically measure preload.
Choice C reason: Central Venous Pressure (CVP) is a direct measure of the blood volume returning to the heart and the ability of the heart to pump the blood into the arterial system, making it a key indicator of preload.
Choice D reason: Systemic Vascular Resistance refers to the resistance to blood flow offered by all of the systemic vasculature, excluding the pulmonary vasculature, and is not a measure of preload.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Dabigatran does not specifically slow the ventricular response; medications like beta-blockers are typically used for rate control in atrial fibrillation.
Choice B reason: Dabigatran is an anticoagulant that reduces the risk of stroke and systemic embolism in patients with nonvalvular atrial fibrillation by preventing clot formation.
Choice C reason: Dabigatran does not convert atrial fibrillation to sinus rhythm; that would be the role of antiarrhythmic drugs or procedures like cardioversion.
Choice D reason: While dabigatran can prevent clots from forming, it is not used to dissolve existing clots; thrombolytic agents are used for that purpose.
Correct Answer is C
Explanation
Choice A reason: A negative urine dipstick for nitrites is more indicative of a lack of bacterial infection and is not directly related to glomerulonephritis.
Choice B reason: While the absence of pain or burning with voiding is positive, it does not specifically indicate the resolution of glomerulonephritis.
Choice C reason: The resolution of periorbital and peripheral edema is a sign that the treatment for glomerulonephritis has been effective, as edema is a common symptom of this condition.
Choice D reason: A decrease in the anti-streptolysin-O (ASO) titer may indicate a response to treatment for a streptococcal infection, but it is not the most direct indicator of effective treatment for glomerulonephritis.
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