Coronary circulation, part of the systemic circulatory system that supplies blood to and provides drainage from the tissues of the heart. In the human heart, two coronary arteries arise from the aorta just beyond the semilunar valves; during diastole, …

Coronary circulation is the circulation of blood in the arteries and veins that supply the heart muscle (myocardium). Coronary arteries supply oxygenated blood to the heart muscle. Cardiac veins then drain away the blood after it has been deoxygenated.

2023年5月1日 · This demand for oxygen is met by the coronary circulation, which is responsible for delivering blood to the myocardium and represents approximately 5% of cardiac output. Adequate blood flow through the coronary vessels is critical to avoid ischemia and maintain the integrity of the myocardial tissue.

2023年7月13日 · The coronary arteries are responsible for carrying nutrient-rich, oxygenated blood from the left ventricle to the myocardium; while the coronary veins take nutrient – poor deoxygenated blood away from the myocardium and to the right atrium.

Identify the veins and arteries of the coronary circulation system; Describe how atherosclerosis impacts blood flow in coronary arteries

Coronary Circulation. The first vessels that branch from the ascending aorta are the paired coronary arteries (see Figure 20.5.4), which arise from two of the three sinuses in the ascending aorta just superior to the aortic semilunar valve. These sinuses contain the aortic baroreceptors and chemoreceptors critical to maintain cardiac function.

Coronary Circulation. Okay, the coronary circulation system is mainly made up of arteries and veins. To begin, the arterial supply of the heart starts with the branching out of the left and right coronary arteries from the base of the aorta. It’s like a superhighway that carries oxygenated blood from the heart to the rest of the body. Left ...

The major vessels of the coronary circulation are the left main coronary that divides into left anterior descending and circumflex branches, and the right main coronary artery. The left and right coronary arteries originate at the base of the aorta from openings called the coronary ostia, behind the aortic valve leaflets.

2015年1月1日 · Coronary blood flow (CBF) is regulated in order to match oxygen requirements by myocardial cells and may increase up to fivefold, compared to baseline (coronary flow reserve), due to maximal myocardial oxygen demand, as a result of maximal dilatation of small resistance coronary arteries (arterioles and pre-arterioles).

How to assess the functional significance of diffuse disease, whether or not with super-imposed focal lesions? (vessel size/perfusion area relation, endothelium, regulation of coronary blood flow), but also under pathologic circumstances ( atherosclerosis, …