A nurse is reviewing the morning laboratory results of electrolytes for four clients who are receiving digoxin. Which of the following clients should the nurse identify as being at risk for developing digoxin toxicity?

a. Circular, erythematous patches on the scalp: This description is more indicative of tinea capitis, a fungal infection affecting the scalp.

b. Recent exposure to poison ivy: Poison ivy exposure would result in a contact dermatitis rash, not tinea pedis.

c. Scaling and redness between the toes: Tinea pedis, also known as athlete's foot, commonly presents with scaling, redness, and itching between the toes.

d. A recent prescription for an antiseizure medication: Antiseizure medications are not associated with the development of tinea pedis.

a. Increasing dyspnea: Atelectasis is the collapse of alveoli, leading to decreased lung volume and impaired gas exchange. Dyspnea (difficulty breathing) is a common symptom as the lung's ability to oxygenate the blood is compromised.

b. Dry cough: A dry cough may be present, but it is not specific to atelectasis. It can occur for various reasons postoperatively.

c. Facial flushing: Facial flushing is not a typical finding in atelectasis. It is more commonly associated with conditions such as fever or allergic reactions.

d. Decreasing respiratory rate: Atelectasis can lead to increased respiratory rate as the body tries to compensate for decreased lung function. A decreasing respiratory rate would be less likely in the presence of atelectasis.