The nurse cares for a client with a history of cardiac dysrhythmias. Which vital sign should the nurse prioritize when conducting the assessment?

A. While temperature is an important vital sign, it is not directly related to cardiac rhythm or dysrhythmias. Abnormal temperature may influence heart rate indirectly (e.g., fever causing tachycardia), but it is not the priority assessment for a client with known cardiac dysrhythmias. B. Pulse oximetry measures oxygen saturation and can indicate hypoxia. Although oxygenation is important, dysrhythmias primarily affect heart rate and rhythm rather than oxygen saturation directly. It is secondary to assessing the pulse in this context. C. The pulse is the most critical vital sign to assess in a client with a history of cardiac dysrhythmias. Evaluating the rate, rhythm, and quality of the pulse allows the nurse to identify irregularities such as tachycardia, bradycardia, skipped beats, or other arrhythmias. Dysrhythmias can lead to decreased cardiac output, hypotension, syncope, or sudden cardiac events, so prompt identification is essential for timely intervention. D. Respiratory rate is important for overall assessment, especially if dysrhythmias compromise cardiac output, but it is not the primary indicator of cardiac rhythm issues. It is a secondary assessment compared with the pulse.