A nurse is interpreting the cardiac rhythm strip of a client who was admitted with syncope. Which of the following images indicates that the client has atrial fibrillation?

A. First image: The rhythm shows irregular beats with visible P waves before each QRS complex, which is more consistent with normal sinus rhythm with occasional premature beats, not atrial fibrillation. B. Second image: The rhythm appears regular with consistent P waves preceding each QRS, indicating normal sinus rhythm. There are no signs of atrial fibrillation. C. Third image: The rhythm is irregularly irregular with no discernible P waves and variable R-R intervals, which are hallmark features of atrial fibrillation. This rhythm increases the client’s risk for thromboembolism and requires careful monitoring and management.