Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
median ramusAn artery whose origin bisects the origins of both the left anterior descending artery and the circumflex artery. When a median ramus branch is present, the left main will be seen to trifurcate in the left anterior oblique caudal projection, and the median ramus artery is the middle artery at this point of trifurcation.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.