A thoracic aortic aneurysm is a balloon-like bulge in the chest portion of the body’s main artery. It grows slowly and is usually silent, so symptoms often start only when it begins to press on nearby structures or leak. Deep chest pressure is the hallmark. It feels like a weight or tight band behind the breast-bone that doesn’t go away with rest or antacids. Back pain between the shoulder blades is common. It’s dull, persistent, and can throb more when you lie flat. Hoarseness or voice change appears if the aneurysm stretches the nerve to the voice box. Cough shows... Learn more