A nurse is caring for a client who is alert and oriented and is receiving continuous ECG monitoring.
The cardiac rhythm strip shows a wavy baseline, no distinguishable P waves, and an increased heart rate.
The nurse should identify the cardiac rhythm as which of the following?
Atrial fibrillation.
Ventricular asystole.
Second-degree heart block.
Sinus tachycardia.
The Correct Answer is A
Choice A rationale:
The described cardiac rhythm with a wavy baseline, no distinguishable P waves, and an increased heart rate is consistent with atrial fibrillation. In atrial fibrillation, the atria quiver instead of contracting effectively, leading to an irregular and often rapid heart rate. This rhythm is characterized by the absence of distinct P waves on the ECG.
Choice B rationale:
Ventricular asystole is a flatline on the ECG, indicating the absence of electrical activity in the heart. It is a life-threatening arrhythmia and requires immediate intervention with cardiopulmonary resuscitation (CPR) and advanced cardiac life support (ACLS) protocols.
Choice C rationale:
Second-degree heart block is characterized by intermittent failure of atrial electrical impulses to conduct to the ventricles. This results in occasional dropped beats and a varying heart rate. It is not consistent with the described ECG findings in the question.
Choice D rationale:
Sinus tachycardia is a regular, fast heart rate originating from the sinoatrial (SA) node. In sinus tachycardia, P waves are present, indicating that the electrical impulses originate in the SA node. The described ECG findings do not match the characteristics of sinus tachycardia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The correct answer is choice B: Axillary.
Choice B rationale: The axillary site, or under the arm, is the preferred site for obtaining the temperature of a newborn. This method is safe and generally well-tolerated by infants. It carries a lower risk of injury or discomfort compared to other methods.
Choice A rationale: Rectal temperature measurement can be accurate but is more invasive and may cause discomfort or injury to the newborn. It is generally not the preferred method for routine temperature checks in newborns.
Choice C rationale: Tympanic temperature measurement, which uses the ear canal, may not be accurate for newborns due to their small ear canal size and the presence of vernix caseosa or amniotic fluid.
Choice D rationale: Oral temperature measurement is not suitable for newborns as they cannot hold the thermometer in their mouth safely or reliably. This method is more appropriate for older children and adults.
Correct Answer is {"A":{"answers":"A"},"B":{"answers":"B"},"C":{"answers":"B"},"D":{"answers":"A"},"E":{"answers":"B"}}
No explanation
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