Afterload is most accurately described by which of the following?
Fluid volume status.
Atrial contraction (kick).
Resistance to blood flow.
Myocardial compliance.
The Correct Answer is C
Choice A reason: Fluid volume status affects preload, not afterload.
Choice B reason: Atrial contraction contributes to filling of the ventricles, not to afterload.
Choice C reason: Afterload is the resistance left ventricular must overcome to circulate blood, which is accurately described as resistance to blood flow.
Choice D reason: Myocardial compliance refers to the elasticity of the heart muscle, which affects how the heart fills, not the resistance it must overcome to eject blood.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: A PR interval of 0.04-0.20 seconds is too broad and includes values that are both below and above the normal range.
Choice B reason: A PR interval of 0.12-0.20 seconds is the established normal range for adults, reflecting proper conduction through the AV node.
Choice C reason: The PR interval being less than half the R-to-R ratio is not a standard measurement for PR intervals and does not provide a specific range.
Choice D reason: A PR interval of 0.08-0.10 seconds is below the normal range and may suggest pre-excitation or an AV nodal (junctional) rhythm.
Correct Answer is A
Explanation
Choice A reason: Stopping the transfusion immediately is the first and most critical action in response to signs of a possible transfusion reaction, which can be life-threatening.
Choice B reason: While informing the provider is a necessary step, it should come after stopping the transfusion to prevent further harm to the patient.
Choice C reason: Calling the lab is an appropriate action but not the first priority. The immediate concern is the patient's safety.
Choice D reason: Obtaining a urine specimen may be part of the diagnostic process for a transfusion reaction, but it is not the first action to take.
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