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?

Normal sinus rhythm originates from the sinoatrial node with orderly atrial and ventricular depolarization. Essential characteristics include regular rhythm, P wave preceding each QRS complex, normal PR interval (0.12–0.20 seconds), and narrow QRS complexes (<0.12 seconds), reflecting intact conduction pathways. Rationale: A. A PR interval of 0.22 seconds indicates first-degree atrioventricular block, representing delayed conduction through the AV node. This is not normal sinus rhythm because it exceeds the normal PR interval range of 0.12–0.20 seconds. B. A P wave occurring before each QRS complex reflects normal atrial depolarization followed by ventricular depolarization, indicating intact conduction from the SA node through the AV node and His-Purkinje system, consistent with normal sinus rhythm. C. A QRS duration of 0.20 seconds indicates ventricular conduction delay, such as bundle branch block or ventricular rhythm. Normal QRS duration is <0.12 seconds, so this finding is abnormal. D. Inverted T waves represent abnormal ventricular repolarization, often associated with ischemia, electrolyte imbalance, or conduction abnormalities. Normal sinus rhythm typically has upright T waves in most leads.