Atherosclerosis (or arteriosclerotic vascular disease) is a condition where the arteries become narrowed and hardened due to an excessive build up of plaque around the artery wall. The disease disrupts the flow of blood around the body, posing serious cardiovascular complications.therosclerosis (or arteriosclerotic vascular disease) is a condition where the arteries become narrowed and hardened due to an excessive build up of plaque around the artery wall. The disease disrupts the flow of blood around the body, posing serious cardiovascular complications.
Tiny Chihuahua Milly is the worldâs smallest dog at just 3.8 inches high. 1  Micro Mutt weighs was born in December 2011 but has failed to grow any larger than an average Chihuahua puppy.  She replaces former record holder Boo Boo from Kentucky in the U.S. who towers over her at 4.2 inches.
The 10 Smallest Dog Breeds. 1  The Chihuahua: This choice is no surprise, but Milly, a Chihuahua from Puerto Rico, outdid all others of her breed by weighing in at only 7 ounces (full grown) this year. 2  Chihuahuas usually weigh around 4 to 6 pounds on average.