
#Product Trends
What are Coronary Arteries?
The shape of the heart is like an upside-down, slightly flattened cone at the front and rear.
If you think of it as a head, the coronary arteries at the top of the head and almost encircling the heart are like a crown, which is where the name comes from. Coronary arteries are the arteries that supply blood to the heart. They originate from the root of the aorta and are divided into left and right branches that run on the surface of the heart. Using the classification principle of Schlesinger et al., the distribution of coronary arteries is divided into three types: 1. Right-dominant type; 2. Balanced type; 3. Left-dominant type.
To maintain the normal life activities of various tissues and organs of the human body, the heart needs to beat continuously to ensure blood supply. As a muscular power organ that pumps blood, the heart itself also needs sufficient nutrients and energy. The vascular system that supplies the heart with nutrients is the coronary arteries and veins, also known as coronary circulation. Coronary arteries are the arteries that supply blood to the heart. They originate from the root of the aorta and are divided into left and right branches that run on the surface of the heart. Under normal circumstances, its resistance to blood is very small, less than 5% of the total coronary resistance, and the blood vessels entering the heart wall from the epicardial artery are scattered in a plexi-like manner to innervate the outer and middle myocardium of the ventricular wall; It enters the ventricular wall vertically and reaches the subendocardium (that is, the perforator), with almost no reduction in diameter, and forms an arcuate network with other perforators under the endocardium, and then divides into arterioles and capillaries. Plexus branches and perforators form a rich capillary network between myocardial fibers, supplying myocardial blood. Since the coronary arteries travel within the myocardium, they are obviously subject to the influence of myocardial contraction and compression. That is to say, when the heart contracts, it is not easy for blood to pass through, and only when it relaxes, the heart can get enough blood flow, which is the characteristic of coronary blood supply.
