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 B
Explanation
Choice A reason: Brief, intense depressive episodes with full recovery are characteristic of major depressive disorder, not dysthymia. Dysthymic disorder involves persistent, less severe symptoms over at least two years, without complete remission, making this an incorrect description.
Choice B reason: Dysthymic disorder is defined by a chronic low mood lasting at least two years, with milder symptoms (e.g., low energy, poor self-esteem) than major depressive disorder. This persistent, less severe state aligns with the diagnosis, making this the correct feature.
Choice C reason: Depressive symptoms for two weeks during winter months describe seasonal affective disorder, not dysthymia. Dysthymic disorder is chronic and not seasonally limited, with symptoms persisting for years, making this an incorrect characteristic.
Choice D reason: Sudden, intense depressive episodes followed by high-energy periods suggest bipolar disorder, not dysthymia. Dysthymic disorder involves continuous low-grade depression without manic or hypomanic episodes, making this an inaccurate description of the condition.
Correct Answer is A
Explanation
Choice A reason: Benzodiazepines enhance GABA activity, leading to rapid anxiety relief but with a high risk of tolerance and dependence. Teaching about this risk is critical to ensure the client understands the need for medical supervision, potential withdrawal symptoms, and strategies to prevent misuse or long-term dependency.
Choice B reason: Taking benzodiazepines with food may reduce gastrointestinal upset, but the timing is not critical for efficacy. This instruction is less urgent than addressing dependence, as benzodiazepines are effective regardless of meal timing, and the primary concern is their addictive potential.
Choice C reason: Discontinuing benzodiazepines abruptly can cause severe withdrawal symptoms, including seizures, due to their effect on GABA receptors. This is dangerous advice, as gradual tapering under medical supervision is required, making this choice incorrect and less critical than teaching about dependence risks.
Choice D reason: Increased caffeine consumption can counteract benzodiazepine effects by stimulating the central nervous system, potentially worsening anxiety. This is incorrect advice, as it could reduce the medication’s efficacy and exacerbate symptoms, making it less relevant than educating about dependence and tolerance risks.
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