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.
Manubrium. 1  The manubrium sterni is the most superior part of the sternum that lies at the levels of 3rd and 4th thoracic vertebrae. 2  The superior border of the manubrium has the broadest structure among the other parts of the sternum. 3  On its center is the suprasternal or presternal or jugular notch.