11-01-2013, 04:05 PM
Anatomy Of Coronary Circulation AND Factors Affecting It
Anatomy Of Coronary Circulatio.pptx (Size: 1.61 MB / Downloads: 23)
Coronary Vascular Resistance
Epicardial conductance vessels
Only a small % of resistance normally
Stenotic lesions
Intramyocardial vessels (arterioles)
Contribute most to total coronary vascular resistance
CORONARY CIRCULATION
BLOOD SUPPLY OF THE HEART:
Arterial supply:
- The cardiac muscle is supplied by the first two branches of the aorta i.e. right & left coronary arteries.
The coronary arteries branch freely to form a rich capillary network.
There is about one capillary for each cardiac muscle fiber.
Venous Drainage
Coronary venous drainage occurs through two systems: 1) Superficial system: It is formed of coronary sinus and anterior cardiac veins that open into the right atrium. 2) Deep system: which drains the rest of the heart. It is formed of thebasian veins and arterio-sinusoidal vessels that open directly into the heart chamber.