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right Valsava sinus and passes between the pulmonary trunk and
right auricle, rounds the heart along the right coronary artery,
passes into posterior surface of the heart and anastomoses with
circumflex branch of the left coronary artery. The largest branch of
right coronary artery is r. interventricularis posterior which is located
in the right coronary artery and goes to the apex of the heart
alongside v. cordis media.
Each coronary artery and their branches have their
branchings. Branches of the left coronary artery supply with
blood the left pulmonary atrium, anterior and most part of
posterior wall of the left ventricle, part of anterior wall of the
right ventricle and anterior part of interventricular septum.
The right coronary artery supplies with blood the right
atrium, the conducting system of the heart, posterior wall of
right and left ventricles, posterior part of interventricular
septum, m. papillaris posterior of the left ventricle.
The branches of left and right coronary arteries anastomose
with each other and form in the heart two arterial circles:
lateral arterial circle located in the coronary sulcus and
longitudinal arterial circle which is located in the anterior and
posterior interventricular sulcus.
There are three types of blood supply of the heart: right
coronary circulation in (90 % of people), left coronary
circulation and balanced circulation. In balanced circulation
both coronary arteries are developed and two posterior
interventricular branches are be observed. In right coronary
circulation the branches of right coronary arteries prevail and
in left coronary circulation – branches of left coronary artries.
Knowing types of blood circulation helps surgeons to choose
correct way in surgical treatment of coronary insufficiency.
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