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
Choice A rationale:
Sitting in high-Fowler's position during the feeding is actually a preventive measure against aspiration. High-Fowler's position, which involves sitting the patient upright at a 90-degree angle, reduces the risk of aspiration by promoting proper digestion and preventing the regurgitation of gastric contents into the lungs.
Choice B rationale:
A history of gastroesophageal reflux disease (GERD) puts the client at risk for aspiration. GERD is a chronic condition in which stomach acid frequently flows back into the esophagus, potentially reaching the throat and lungs, increasing the risk of aspiration during enteral feedings. Aspiration pneumonia, a serious complication, can develop if stomach contents enter the lungs.
Choice C rationale:
A residual of 65 mL 1 hr postprandial indicates that a significant amount of the feeding solution has not been absorbed, raising concerns about delayed gastric emptying. While this situation might require monitoring and adjustments to the feeding regimen, it does not directly increase the risk of aspiration. Aspiration risk is more related to the reflux of stomach contents into the airways.
Choice D rationale:
Receiving a high-osmolarity formula alone does not directly increase the risk of aspiration. High-osmolarity formulas might require careful administration and monitoring to prevent complications, but aspiration risk is more closely associated with the client's underlying conditions, such as GERD.
Correct Answer is B
Explanation
Choice A rationale:
Moderate variability in the FHR is a reassuring sign of fetal well-being, indicating a responsive fetal autonomic nervous system to normal physiologic stimuli. It is considered a normal finding in active labor, suggesting that the fetus is well-oxygenated and able to cope with contractions.
Choice B rationale:
Prolonged decelerations are concerning patterns on the fetal heart rate (FHR) monitor, indicating potential fetal distress. Prolonged decelerations are defined as lasting more than 2 minutes but less than 10 minutes. These decelerations can be caused by umbilical cord compression, placental insufficiency, or maternal hypotension. Prompt intervention is required, making this choice the correct answer.
Choice C rationale:
Three uterine contractions within 10 minutes, also known as a contraction stress test (CST), is a normal finding. It assesses the fetal response to stress and is used to evaluate the placental function and fetal well-being.
Choice D rationale:
A baseline FHR of 115/min is within the normal range (110-160 beats per minute) for a term fetus. It indicates a stable fetal heart rate, and there is no immediate need for intervention.
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