precordium
All thoracic (chest) structures including heart, lungs, diaphragm, great vessels.
anterior interventricular sulcus
It contains the heart, the great vessels of the heart, esophagus, trachea, phrenic nerve, cardiac nerve, thoracic duct, thymus, and lymph nodes of the central chest
Could be a heart attack, esp if you have situs inversus (heart and great vessels on the right side of the chest instead of left--RARE). If you have ever had a chest Xray, they should have told you if your heart's on the right.
The organs found in the thoracic cavity are the heart and lungs. There are other things found there as well: the trachea, bronchi, great vessels, esophagus, thymus, vagus and phrenic nerves.
The Mediastinum doesn't contain either, it contains the heart, thymus gland, portions of the esophagus and trachea among other structures. It's located between the Lungs and is separeted into the anterior, middle, posterior, and superior Mediastinum regions. I hope this clears things up.
Breast implants or work out
The treasure was a chest full of gold coins, jewels, and stocks and bonds.
The Base
The mediastinum contains the heart, great vessels, and distal trachea.
small cardiac vein
Every living tissue requires blood for it's survival, so does blood vessels, great vessels even have small vessels to supply themselves and they are called as "Vasa vasorum"