A nurse is caring for a client who has an electrolyte imbalance with a potassium level of 6.4 mEq/L. Which of the following should the nurse administer?

A) Measure the client's manifestations using an anxiety rating scale: This action is essential as the first step because it allows the nurse to accurately assess the severity of the client's anxiety. Understanding the level of anxiety helps in planning appropriate interventions and monitoring the effectiveness of any treatment provided. Accurate assessment is foundational in clinical decision making.

B) Initiate a referral to a local support group: While beneficial, referring the client to a support group should follow an initial assessment. Support groups can offer long-term benefits, but immediate needs and severity must be evaluated first.

C) Assist in finding alternative ways to cope: Helping the client develop coping strategies is an important intervention. However, before suggesting specific coping mechanisms, the nurse needs to understand the current level of anxiety and how it affects the client. This ensures that the coping strategies are appropriately tailored.

D) Administer an antianxiety medication: Administering medication can be crucial in managing severe anxiety, but this step should come after a thorough assessment. The nurse needs to determine if medication is necessary and what dosage might be appropriate, based on the anxiety rating scale and other assessment findings.

A) Weight gain: Weight gain is more commonly associated with right-sided heart failure due to fluid retention and peripheral edema. While left-sided heart failure can lead to overall heart failure, causing weight gain, it is not as specific as breathlessness for left-sided failure.

B) Warm extremities after walking: Warm extremities are generally a sign of good circulation. In clients with left-sided heart failure, reduced cardiac output often leads to poor peripheral circulation, which would more likely cause cool extremities.

C) Breathlessness when carrying an object: Left-sided heart failure leads to decreased cardiac output and pulmonary congestion. As a result, clients often experience breathlessness or dyspnea, especially during physical activities, because the heart cannot efficiently pump blood, leading to fluid buildup in the lungs.

D) Increased urinary output during the day: Left-sided heart failure usually causes decreased renal perfusion, leading to reduced urinary output during the day. Clients might experience nocturia (increased nighttime urination) due to fluid reabsorption when lying down, but increased daytime output is not typical.