The nurse notes that on a client's electrocardiogram tracing, there is one P wave for every QRS complex and a delay in the impulse transmission at the AV node. This regular rhythm is identified as:

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First-degree AV block is characterized by a consistent delay in the impulse transmission at the AV node, with each P wave followed by a QRS complex, indicating that all atrial impulses are eventually conducted to the ventricles, but more slowly than normal.

The Nurse Notes That on a Client's Electrocardiogram Tracing, There