The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA sinoatrial and AV atrioventricular nodes, which regulate the heart rhythm. The right coronary artery divides into smaller branches, including the right posterior descending artery and the acute marginal artery. Together with the left anterior descending artery, the right coronary artery helps supply blood to the middle or septum of the heart.
Smaller branches of the coronary arteries include: obtuse marginal OM , septal perforator SP , and diagonals. Since coronary arteries deliver blood to the heart muscle, any coronary artery disorder or disease can have serious implications by reducing the flow of oxygen and nutrients to the heart muscle.
This can lead to a heart attack and possibly death. Atherosclerosis a buildup of plaque in the inner lining of an artery causing it to narrow or become blocked is the most common cause of heart disease.
Health Home Conditions and Diseases. The lateral veins, also known as the left marginal veins or the obtuse marginal veins, course along the left side of the heart and drain the left ventricular myocardium into the great cardiac vein or coronary sinus [7]. They are commonly located in an inferior position at an obtuse angle of the heart [10] and parallel the course of the left marginal branch of the left coronary artery [11]. The inferior veins of the left ventricle, previously known as the posterior veins of the left ventricle, typically originate from the lateral and inferior aspects of the left ventricle and course between the great cardiac vein and middle cardiac vein [4,7].
The vessels generally drain into the coronary sinus. Similar to the lateral veins, the anatomy of the inferior veins is also highly variable [4]. The middle cardiac vein, also referred to as the posterior interventricular vein or more correctly, the inferior interventricular vein, is a major coronary vein that typically originates near the apex and usually ascends in or very near to the posterior interventricular sulcus [4,6,7].
The middle cardiac vein drains into the coronary sinus or directly into the right atrium [4]. The small cardiac vein, also known as the right cardiac vein [12], commonly drains the inferior and lateral wall of the right ventricle.
A small vein in comparison to the previously mentioned veins, the small cardiac vein originates in the inferior part of the right coronary sulcus and courses the base of the right ventricle, paralleling the right coronary artery [7]. This vein typically empties into the coronary sinus, but sometimes drains into the middle cardiac vein or directly into the right atrium.
The small cardiac vein is not always present in the human cardiac venous system [7]. The oblique vein of the left atrium, also referred to as Marshall's vein since it was first reported by John Marshall, delivers deoxygenated blood from the lateral and inferior regions of the left atrium to the atrioventricular groove [4].
As mentioned earlier, the termination of this vein is an anatomical landmark for the origin of the coronary sinus and the end of the great cardiac vein. Go to the U of M home page. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. Privacy Statement. Updating… Please wait. Unable to process the form. Check for errors and try again.
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