Coronary circulation

CORONARY CIRCULATION
Origin of the
coronary arteries
The coronary arteries originate from the ascending aorta

just superior to the cusps of the aortic semi lunar valve
diastole backflow of blood
During
fills the spaces above each cusp
aortic sinus closing the valve
Blood then enters the Ostia openings
of the
coronary arteries that are located
in the R L aortic sinuses




Rightcoronaryartery
The RCA
originates
from the
Rightaortic
sinus runs between

the right auricle t
pulmonary trunk then
in the coronary sulcus towards the crux of the

heart

, Anatomical variation In 60 of people the sinoatrial
branch from the RCA in the
originates
other 40 it originates from the LCA




Left coronary
artery
The LCA originates from the left
aortic sinus It runs between the

L auricle and
pulmonary trunk It

branches into the
runs in


Anterior intero ventricular
artery
runs in to inter ventricular sulcus
to crux

There are areas of anastimos is at the crux RCA and
circumflex a and apex Cposterior and anterior inter ventricular
aa