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Cardiology - Coronary Blood Supply

7TH APRIL, 2024

Arterial Supply (00:05)

Right Coronary Artery Origin (00:31)

Right Coronary Artery (00:35)

Posterior Interventricular Artery (02:10)

Left Coronary Artery Origin (02:28)

Branches and Distribution Anterior Interventricular Artery (03:38)

Angina Pectoris (04:24)

Myocardial Infarction (05:02)

Clinical Features of Myocardial Infarction (05:28)

Sites of Coronary Artery Occlusion (05:53)

Heart Venous Drainage of the Heart (06:33)

Coronary Sinus (06:58)

Tributaries (07:13)

Middle Cardiac Vein (07:27)

Right Marginal Vein (08:16)

Left Coronary Artery (LCA):

Main Branches:

Left Main Coronary Artery (LMCA): Also known as the left main stem, it is a short artery that divides into two main branches: the left anterior descending artery (LAD) and the left circumflex artery (LCx).

Left Anterior Descending Artery (LAD): Supplies blood to the anterior wall of the left ventricle and a portion of the interventricular septum.

Left Circumflex Artery (LCx): Supplies blood to the lateral wall of the left ventricle and often gives rise to the obtuse marginal branches.

Function: The left coronary artery supplies blood to the left side of the heart, including a significant portion of the left ventricle, which is responsible for pumping oxygenated blood to the body.

Right Coronary Artery (RCA):

Main Branches:

Right Main Coronary Artery: Typically gives rise to the posterior descending artery (PDA) and the atrioventricular nodal artery (AV nodal artery).

Posterior Descending Artery (PDA) or Posterior Interventricular Artery: Supplies blood to the posterior part of the interventricular septum and the inferior wall of the left and right ventricles.

Atrioventricular Nodal Artery (AV Nodal Artery): Supplies blood to the atrioventricular (AV) node, which plays a role in regulating the heart's electrical conduction system.

Function: The right coronary artery supplies blood to the right side of the heart, including the right atrium, right ventricle, and portions of the interventricular septum.

Coronary Veins:

Great Cardiac Vein:

Function: Collects deoxygenated blood from the front of the heart and drains it into the coronary sinus.

Middle Cardiac Vein:

Function: Drains deoxygenated blood from the posterior part of the heart and empties into the coronary sinus.

Small Cardiac Vein:

Function: Drains deoxygenated blood from the right atrium and the back of the heart, emptying into the coronary sinus.

Coronary Sinus:

Function: Receives deoxygenated blood from the coronary veins and drains it into the right atrium of the heart.

These arteries and veins work together to ensure that the heart receives the oxygen-rich blood it needs to function properly. Any blockages or narrowing in these vessels can lead to coronary artery disease, heart attack, or other cardiovascular complications. Proper management of cardiovascular risk factors and timely intervention are crucial for maintaining coronary artery and vein health and preventing heart-related conditions.

Additional References...

Introduction (00:00)

What is the coronary circulation? (00:19)

Function of coronary arteries (02:14)

Coronary arteries are "end arteries" (at 3:19 i am sorry for my mistake ... cardiac arrest is NOT the same as a heart attack) (02:27)

Right coronary artery (RCA) (03:43)

Sinuatrial nodal (SA) artery (05:04)

Right marginal artery (acute marginal artery) (05:18)

Posterior descending artery (PDA) (06:01)

Definition of coronary dominance (right dominant, left dominant, co-dominant) (06:50)

AV nodal artery

Left coronary artery (LCA) (08:50)

Left anterior descending artery (LAD); Anterior interventricular artery (09:33)

Left circumflex artery (LCX) (10:39)

Left marginal artery (obtuse marginal artery) (11:27)

Cardiac veins (coronary sinus, great cardiac vein, middle cardiac vein, small cardiac vein) (12:01)

Regulation of blood flow in coronary circulation (13:34)

In-a-nutshell (14:15)

References (15:05)