Multiple outlets describe aortic dissection as a rare but life-threatening medical emergency. It occurs when the inner layer of the aorta, the large artery carrying blood from the heart, tears. Blood then flows into the space between the layers of the aortic wall, which can rapidly damage the vessel and lead to severe complications. Sources note that onset is typically sudden and symptoms can be hard to recognize early. A classic presentation includes intense chest pain that may extend to the back, though warnings are not always clear or present. Medical experts characterize it as particularly dangerous and challenging to treat, emphasizing the need for urgent care. The articles also point to risk factors that raise the likelihood of dissection, including high blood pressure and atherosclerosis (plaque buildup in arteries). Risk is often discussed in connection with older adults and men. The reported death of U.S. Senator Lindsey Graham is tied to this condition, underscoring its potentially fatal nature when symptoms appear abruptly.