The thyroid gland is responsible for controlling your body's use of energy. An overactive thyroid (or hyperthyroidism) increases the use of energy in your body, making it work faster. This, in turn, makes your heart work harder, potentially causing heart failure.

There are several treatments for hyperthyroidism. If your doctor diagnoses this condition, he or she may discuss treatment options for an overactive thyroid gland.

Return to What causes heart failure?