What is the primary purpose of atenolol in a client with thyrotoxicosis?

The primary purpose of atenolol in a client with thyrotoxicosis is to treat symptoms of hyperthyroidism, such as increased heart rate. Atenolol is a beta-blocker that is effective in managing the cardiovascular symptoms associated with excess thyroid hormone levels. In conditions like thyrotoxicosis, patients often experience a rapid heart rate, palpitations, and increased blood pressure, which can lead to further complications. Atenolol helps to mitigate these symptoms by blocking beta-adrenergic receptors, thereby reducing heart rate and decreasing myocardial contractility.

This symptomatic relief is crucial for improving the patient’s comfort and quality of life while other definitive treatments for hyperthyroidism, such as antithyroid medications or radioactive iodine therapy, are being planned or administered. The other options, while related to the pathophysiology of hyperthyroidism, do not reflect atenolol's primary role in managing the symptoms associated with thyrotoxicosis.