Class notes
Coronary circulation
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Lecture notes of 6 pages for the course Medicine at QUB (Anatomy)
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CORONARY CIRCULATIONOrigin 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
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