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

Rationale: A. There is a P wave before every QRS complex is correct because in a normal sinus rhythm, the electrical impulse originates from the sinoatrial (SA) node, the heart’s natural pacemaker. This impulse causes atrial depolarization, represented by the P wave, followed by ventricular depolarization, represented by the QRS complex. The presence of a P wave before every QRS complex ensures that the atria are properly contracting and contributing to ventricular filling, which is critical for efficient cardiac output. This pattern is a hallmark of normal conduction and sinus rhythm. B. The T wave is in the upside down position is incorrect because in a normal ECG, the T wave should be upright in most leads, including leads I, II, and V2–V6. Inverted T waves can indicate myocardial ischemia, infarction, electrolyte imbalances (e.g., hypokalemia), or ventricular strain, which are pathological changes, not normal findings. C. The QRS is not present in every fourth beat is incorrect because missing QRS complexes indicate dropped beats, which could be due to heart blocks, premature atrial or ventricular contractions, or other conduction abnormalities. This is not part of a normal rhythm and requires immediate assessment, especially in symptomatic clients. D. The P-R interval measures 0.22 seconds is incorrect because the normal P-R interval ranges from 0.12 to 0.20 seconds. A P-R interval of 0.22 seconds indicates first-degree atrioventricular (AV) block, which is an abnormal conduction pattern where the impulse from the atria to the ventricles is delayed. While often asymptomatic, it is not considered a normal ECG finding.