Оригинал
There are Numerous reasons these happen, Stress , strain the effects of Cholesterol (fats In the blood stream) which with age (and other factors Can...) harden the cholesterol inside the arterial walls should this "goop" harden and act like a scab does on the outside, its going to break away and leave a sore spot which is weakened for a period with an artery there are 3 layers the Intima and Adventitia are thin elastic (hopefully) layers that cover the "Media" which is softer inside layer often becomes part of the blood stream when a Dissection (tear) happens... that is called a "False Lumen" which can extend the length of the aorta and even beyond... Less common today Thanks to Shoulder Harness Use in cars and trucks are Traumatic Aortic Dissections which happens when the body Stops suddenly and the heart keeps moving forward tearing the Aortic Arch the person can bleed to death in minutes (motorcycles) I saw one example of the Motorcyclists heart was turned 90 degrees like | instead of _... Some folks have a genetic disease of one kind or another such as Marfan's Syndrome... (there are a NUMBER of Genomes that have been "identified " these generally fall into a group of various connective tissue disorders,....