What is the significance about the cardiac rhythm shown below?
The atria and ventricles are beating independently
The atrial rate is 350 bpm or greater and the ventricular rate is slower
The SA node is firing regularly but not all beats are conducted
The electrical impulse through the AV node is delayed but not blocked
The Correct Answer is C
Choice A reason: Independent atrial and ventricular beating occurs in conditions like third-degree heart block, where AV node conduction fails completely. The description lacks specific rhythm details, but the SA node firing with non-conducted beats suggests a partial conduction issue, not complete dissociation.
Choice B reason: An atrial rate of 350 bpm or greater with a slower ventricular rate suggests atrial flutter or fibrillation. However, the description of regular SA node firing with non-conducted beats points to a conduction block, not a rapid atrial rhythm, making this less likely.
Choice C reason: The SA node firing regularly with non-conducted beats describes a second-degree AV block, where some atrial impulses fail to reach the ventricles due to AV node or bundle branch issues. This matches the symptoms and is the most accurate interpretation of the rhythm.
Choice D reason: A delayed but not blocked AV node impulse describes first-degree heart block, where all beats conduct with a prolonged PR interval. The description of non-conducted beats indicates a more severe conduction issue, such as second-degree block, making this choice incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D","E"]
Explanation
Choice A reason: Buspirone is a non-benzodiazepine anxiolytic that takes weeks to achieve therapeutic effects, making it ineffective for acute panic attacks. It does not provide immediate relief, so administering it during a panic attack does not promote safety or address the client’s acute distress.
Choice B reason: Offering therapy during a panic attack may be overwhelming, as the client’s heightened anxiety impairs their ability to engage in therapeutic dialogue. Safety-focused interventions, like reducing stimuli or staying with the client, are more effective in managing acute panic and ensuring immediate safety.
Choice C reason: Turning off televisions or music reduces environmental stimuli, which can exacerbate a panic attack by overwhelming the client’s heightened sympathetic nervous system response. Minimizing sensory input helps de-escalate anxiety, creating a calmer environment and promoting safety during the acute episode.
Choice D reason: Remaining with the client during a panic attack provides reassurance and ensures safety by monitoring for escalating symptoms or self-harm risks. The nurse’s presence helps stabilize the client emotionally and physically, reducing feelings of isolation and supporting de-escalation of the panic state.
Choice E reason: A calm nursing approach prevents further escalation of the client’s panic by modeling stability and reducing perceived threats. A calm demeanor lowers the client’s sympathetic arousal, fostering a sense of safety and helping to de-escalate the acute anxiety episode effectively.
Correct Answer is D
Explanation
Choice A reason: Incentive spirometry improves lung expansion but is not the priority in acute heart failure with pulmonary edema. Crackles and dyspnea indicate fluid overload, requiring immediate positioning to reduce respiratory distress, making this intervention less urgent than optimizing breathing mechanics.
Choice B reason: Coughing and deep breathing may help clear airways but do not address the underlying pulmonary edema in left-sided heart failure. Fluid in the alveoli causes crackles and dyspnea, requiring positioning to reduce venous return and improve oxygenation, making this less effective initially.
Choice C reason: Elevating the head of the bed to 45 degrees can reduce venous return and ease breathing in heart failure. However, high Fowler’s position (60–90 degrees) is more effective for severe dyspnea and pulmonary edema, as it maximizes lung expansion and oxygenation.
Choice D reason: High Fowler’s position (60–90 degrees) reduces venous return to the heart, decreasing pulmonary congestion in left-sided heart failure. This alleviates dyspnea and crackles by improving lung expansion and oxygenation, making it the most effective initial intervention for acute respiratory distress in this condition.
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