Which of the following is a primary goal of catheter ablation in the treatment of atrial fibrillation?

To strengthen the heart muscle

To decrease the frequency of ventricular contractions

To permanently eliminate the need for anticoagulation therapy

To restore and maintain normal sinus rhythm

Answer and Explanation

The Correct Answer is D

Rationale:
A. Catheter ablation does not directly improve myocardial contractility; its purpose is focused on electrical conduction rather than muscle strength.

B. While controlling ventricular response may occur with medications, ablation targets the atrial electrical pathways rather than directly controlling ventricular rate.

C. Anticoagulation decisions depend on stroke risk (e.g., CHA₂DS₂-VASc score); ablation does not automatically remove the need for anticoagulants.

D. The primary goal of catheter ablation in atrial fibrillation is to eliminate abnormal electrical pathways causing arrhythmia, thereby restoring and maintaining normal sinus rhythm and reducing symptoms.

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Correct Answer is D

Explanation

Rationale:
A. A normal QRS duration is 0.06–0.10 seconds. A duration of 0.20 seconds indicates a ventricular conduction delay or bundle branch block, which is not normal sinus rhythm.

B. A normal PR interval is 0.12–0.20 seconds. A measurement of 0.22 seconds suggests a first-degree heart block, which is an abnormal finding.

C. Normally, T waves are upright in most leads. Inverted T waves can indicate ischemia, infarction, or electrolyte disturbances, which are not consistent with normal sinus rhythm.

D. In normal sinus rhythm, the P wave precedes each QRS complex, reflecting proper atrial depolarization followed by ventricular depolarization. This relationship confirms that the electrical impulse is originating from the sinoatrial (SA) node, which defines normal sinus rhythm.

A. Elevated erythrocyte sedimentation rate (ESR) B. increased brain natriuretic peptide (BNP) C. increased C-reactive protein (CRP) D. Increased BUN E. Elevated thyroid-stimulating hormone (TSH)

Correct Answer is ["A","C"]

Explanation

Rationale:

A. ESR is a nonspecific marker of inflammation. In pericarditis, inflammation of the pericardium leads to an elevated ESR, reflecting the systemic inflammatory response.

B. BNP is elevated in heart failure due to ventricular stretch and volume overload. While pericarditis can affect cardiac function, BNP is not a primary diagnostic marker for pericarditis unless there is associated heart failure.

C. CRP is another nonspecific marker of inflammation. It is commonly elevated in pericarditis and correlates with disease activity and severity.

D. Blood urea nitrogen is a marker of renal function and is not typically affected by pericarditis unless there is concurrent kidney impairment.

E. TSH is used to assess thyroid function and is not related to the inflammatory process seen in pericarditis.

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Which of the following is a primary goal of catheter ablation in the treatment of atrial fibrillation?

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Naxlex Comprehensive Predictor Exams

A nurse is monitoring a client who is on telemetry. Which of the following findings on the ECG strip should the nurse recognize as normal sinus rhythm?

Correct Answer is D

Explanation

A nurse is reviewing laboratory results for a client who has pericarditis. Which of the following blood test results should the nurse anticipate? (Select All that Apply.)

Correct Answer is ["A","C"]

Explanation

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