Conditions list medically reviewed by George Krucik, MD, MBA
The thyroid gland produces a hormone that controls how your cells use energy. Hyperthyroidism occurs when the body produces excessive amounts.
During a heart attack, the blood supply that normally nourishes the heart with oxygen is cut off and the heart muscle begins to die. Learn more.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.