A client arrives to the emergency department by ambulance. The client has a possible traumatic brain injury after a fall from a roof. Which of the following assessment findings will the triage nurse report to the provider immediately?

A. Atrial fibrillation is consistent with the symptoms described. It causes irregular palpitations and dizziness due to the rapid and irregular ventricular rate. The significant pulse deficit can occur because the irregular rhythm may lead to intermittent weak or absent pulses. The ECG typically shows an irregular rhythm with no identifiable P waves and an irregularly irregular ventricular response.
B. Sinus bradycardia does not usually cause a rapid and irregular heart rate. It is characterized by a regular rhythm with a slow heart rate. While it can cause fatigue and dizziness, it does not typically present with an irregular rhythm or a significant pulse deficit. Therefore, it is less consistent with the symptoms described.
C. Sinus tachycardia is characterized by a rapid but regular heart rate. It does not typically present with an irregular rhythm or significant pulse deficit. While it may cause symptoms such as palpitations and

dizziness, the regular rhythm and absence of irregularity in the ECG make it less likely to be the cause of the significant irregular pulse deficit described.
D. First-degree AV block does not usually cause a rapid and irregular heart rate. It typically presents with a regular rhythm but with a prolonged PR interval. It is not typically associated with irregular palpitations or a significant pulse deficit. The symptoms described are not characteristic of first-degree AV block.

A. This description accurately depicts decorticate posturing. The characteristic feature of decorticate posturing is the flexion of the upper extremities (arms) and the extension of the lower extremities (legs). The internal rotation of the legs is often observed in this posture. This pattern is seen in severe brain damage, particularly involving the corticospinal tract.
B. External rotation of the arms is not characteristic of decorticate posturing. In decorticate posturing, the arms are flexed and positioned close to the body, with internal rotation being more typical. Therefore, this option does not accurately describe decorticate posturing.
C. Extension of the arms is more characteristic of decerebrate posturing rather than decorticate posturing. Decerebrate posturing involves the extension of both the arms and legs. Internal rotation of the arms is not a typical feature of decerebrate posturing, so this choice does not describe decorticate posturing.
D. Extension and external rotation of the arms describe decerebrate posturing rather than decorticate posturing. Decerebrate posturing is characterized by the extension of the arms and legs, not flexion. Therefore, this option does not describe decorticate posturing.