The client experienced abdominal surgery the previous day and has just received an opioid medication for report of pain. The client is sitting in a chair next to the bed. An additional activity that the nurse uses to relieve pain is:

A. History of type 2 diabetes is not a rhythm characteristic seen on an ECG. While diabetes can contribute to the development of cardiovascular issues, it does not specifically describe the characteristics of a third-degree AV block on an ECG.
B. Interval and RR interval are irregular is incorrect. In third-degree AV block (also known as complete heart block), the atrial rate and ventricular rate are typically regular, but the atrial and ventricular rhythms are completely dissociated.
C. Shortened PR interval is incorrect. In third-degree AV block, there is no consistent PR interval because the atria and ventricles are functioning independently.
D. Inconsistently shaped P waves is incorrect. P waves may appear normal, but the relationship between P waves and QRS complexes is lost in third-degree AV block.
E. PR interval is constant is incorrect. In third-degree AV block, the PR interval is inconsistent or absent, as the atrial and ventricular rates are independent of each other.
F. Apical heart rate is irrelevant here. The ECG will show the characteristic findings of third-degree AV block rather than focusing on apical heart rate alone.
G. Fewer QRS complexes than P waves is correct. In third-degree AV block, the atrial impulses (P waves) are conducted normally, but the ventricles are completely dissociated from the atrial rhythm, leading to fewer QRS complexes than P waves, as the ventricles may be paced by an escape rhythm.
H. PP interval is equal to RR interval is not necessarily true in third-degree AV block. The PP and RR intervals may be different depending on the escape rhythm, but they are not usually exactly equal.

A. Removing tight clothing is correct because it allows for better heat dissipation and helps cool the patient.
B. Administering acetaminophen is incorrect as acetaminophen reduces fever from infection, not from heat stroke, which requires active cooling measures.
C. Giving salt tablets is incorrect as rapid sodium replacement can cause dangerous fluid shifts; IV fluids are preferred for controlled electrolyte correction.
D. Placing in cool water is correct because immersion cooling is one of the most effective methods to lower body temperature in heat stroke.
E. Initiating IV fluids is correct as the patient likely has dehydration and electrolyte imbalances, requiring fluid resuscitation with isotonic fluids.