Researchers at Cedars-Sinai Medical Center have found that patients with shortness of breath can have a higher risk of dying from cardiac disease than patients without symptoms, and even than patients with typical cardiac pain.
The sternum, commonly known as the breastbone, is a long, narrow flat bone that serves as the keystone of the rib cage and stabilizes the thoracic skeleton. Several muscles that move the arms, head, and neck have their origins on the sternum.
1 Also referred to as the gladiolus, the sternum body constitutes the mid-section of the bony sternum. It directly joins or connects to the 7th and 3rd.  Popularly referred to as the handle, the manubrium is located at the upper segment of the sternum. It is joined to the first 2 ribs.