学习笔记 | 左右冠状动脉

Right and Left Coronary Arteries
右冠状动脉与左冠状动脉

The heart is supplied by 2 coronary arteries which originate just above the aortic valve from the aortic root。
心脏由两支冠状动脉供血，它们均起自主动脉根部、主动脉瓣稍上方。

Right Coronary Artery (RCA)右冠状动脉（RCA）
The right coronary artery has larger primary branches because it supplies the right ventricle through which deoxygenated blood flows。
右冠状动脉其主要分支更粗大，因为它负责供血给右心室，右心室内流动的是静脉血（脱氧血）。

Left Coronary Artery (LCA)
左冠状动脉（LCA）
The left coronary artery after a short course, it divides into:
左冠状动脉走行一段短距离后，分为：
Left Anterior Descending Artery and Left Circumflex Artery (LCx)
左前降支（LAD）和左回旋支动脉（LCx）

LCx can be referred to by multiple terms:
左回旋支有多种称谓：
Circumflex artery (Cx or CX)
回旋支动脉（Cx / CX）
Ramus circumflex artery (RCx or RCX)
回旋支分支动脉（RCx / RCX）
Left circumflex artery (LCx or LCX)
左回旋支动脉（LCx / LCX）

The course and branching pattern of coronary arteries are variable
冠状动脉的走行与分支模式存在个体差异

The left and right coronary arteries have minimal anastomoses (connections) ，In case of occlusion of the main stem or branch of one artery It leads to ischemia up to myocardial infarction beyond the occlusion (occlusion = 100% stenosis)
左、右冠状动脉之间的吻合支（交通支）极少，若某一支动脉的主干或分支发生闭塞闭塞远端会出现心肌缺血，甚至心肌梗死（闭塞即100%狭窄）