The thyroid gland is shaped like a butterfly and resides on either side of the throat. Although it is a tiny organ, it controls the normal metabolism, growth and development of the human body. Once the thyroid is out of control, the number one organ involved is the heart, and palpitation, chest pain, and myocardial infarction may follow. Click the chart to learn how heart health is disturbed by it and 14 signs of thyroid dysfunction.
