Here's a Presentation made by GROUP F on CORONARY CIRCULATION. This slide was created for Problem Based Learning (PBL) wrap up session Held At Kathmandu University- Birat Medical College Teaching Hospital (BMCTH). feel free to Download and share this slide. You can leave comments for further improvement on other presentations. Thankyou. Cheers!

1. CORONARY
CIRCULATION

2. OBJECTIVES
• Introduction to coronary circulation
• Arterial supply
• Venous drainage
• Physiologic Anatomy of coronary blood supply
• Factors affecting coronary circulation
• Applied aspect

3. CORONARY CIRCULATION
• Coronary circulation is the circulation of
blood in the blood vessel of the heart
muscles(myocardium).
• The coronary arteries delivers oxygen-rich
blood to the myocardium.
• Cardiac vein remove the deoxygenated
blood from the heart muscles.

4. CORONARY CIRCULATION
• Coronary circulation consists of
1. Arterial supply
2. Venous drainage

7. CORONARY ARTERIES
• The blood flows through these arteries during
diastole of heart.
• Coronary blood flow is regulated mostly by local
arteriolar vasodilation in response to nutritional
need of cardiac muscle.
• Diameter 1.5mm-5.2mm.
• Left coronary is larger in caliber and supplies
more myocardium.

8. RIGHT CORONARY ARTERY
• It arises from the right anterior aortic sinus
of ascending aorta
• It passes between the right auricle and
pulmonary trunk.

9. BRANCHES
1.Atrial branch
2.Right marginal branch
3.Posterior inter-venticular branch

11. LEFT CORONARY ARTERY
• It originates from left posterior aortic sinus
of ascending aorta
• It passes between pulmonary trunk and left
auricle before entering the coronary sulcus

12. BRANCH
• Anterior inter-ventricular branch(left
anterior descending artery)
• Circumflex branch

14. CARDIAC DOMINANCE
• In about 10 % of hearts, the right coronary
is rather small and is not able to give
posterior inter-ventricular branch.
• In these cases, the left coronary artery
provides the posterior inter-ventricular
branch.
• Such cases are left dominant.

15. VENOUS DRAINAGE
• Coronary sinus
• Anterior cardiac vein
• Venae cordis minimae

16. TRIBUTARIES OF CORONARY SINUS
• Great cardiac vein
• Middle cardiac vein
• Small cardiac vein
• Posterior cardiac vein

18. PHYSOLOGIC ANATOMY OF THE CORONARY
BLOOD SUPPLY
• Coronary artery lies on the surface of heart
• Then small arteries penetrates from the surface
to the cardiac muscle mass
• Through these arteries heart receives its
nutritive blood supply
• This source of muscle nutrition is minuscule

19. CONTINUED
• Right coronary artery supplies
Right atrium and ventricle
Sinu atrial and atrio-ventricular nodes
Inter-arterial septum
The posterior-inferior 1/3 of the inter-
ventricular septum
Posterior part of left ventricle

20. CONTINUED
• Left coronary arteries supplies
Left atrium and left ventricle
Inter-ventricular septum including atrio-
ventricular bundle and its branches

21. FACTORS AFFECTING CORONARY CIRCULATION
• Need of oxygen
• Metabolic factors
• Coronary perfusion pressure
• Nervous factors

22. Applied aspect

23. CORONARY ARTERY DISEASE
• Occlusion of a major coronary artery
• Leads to an inadequate oxygenation of an area of
myocardium and cell death
• Partial blockage may produce pain i.e. angina
Typical symptoms are
Chest heaviness or pressure which is severe lasting
more than 20 minutes associated with sweating

24. Thank you