AVM stands for arteriovenous malformation which is a problem with arteries connecting to veins. In this case the arteries should be connecting to the the capillaries that oxygen and other nutrients flow through the body. You can find more information here:

AVLB - AVLIC - AVLS - AVLU - AVLY - AVMA - AVMF - AVMG - AVMI - AVMIS

Note: We have 93 other definitions for AVM in our Acronym Attic