Hyperthyroidism is a common disease in geriatric cats. It develops when a tumor grows in and disrupts the function of the thyroid gland. This can often result in weight loss. The heart rate is also increased and the heart becomes less efficient. Like other conditions, hyperthyroidism is associated with high blood pressure in cats.
Luckily, hyperthyroidism can be successfully treated with a special type of radioactive iodine treatment. This procedure has an excellent rate of success and has helped many cats overcome their hyperthyroidism.