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Physiology, Coronary Circulation - StatPearls - NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK482413/
The coronary arteries arise from the sinuses of Valsalva, just past the origin of the aortic root. The right coronary artery (RCA), arising from the anterior aortic sinus, supplies blood to the right atrium, right ventricle, sinoatrial node, atrioventricular (AV) node, and select portions of the left ventricle.
Regulation of Coronary Blood Flow - PMC
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5966026/
Regulation of coronary blood flow is quite complex and, after over 100 years of dedicated research, is understood to be dictated through multiple mechanisms that include extravascular compressive forces (tissue pressure), coronary perfusion pressure, myogenic, local metabolic, endothelial as well as neural and hormonal influences.
Physiology Tutorial - Coronary Circulation
http://www.vhlab.umn.edu/atlas/physiology-tutorial/coronary-circulation.shtml
As with all systemic circulatory vascular beds, the aortic or arterial pressure (perfusion pressure) is vital for driving blood through the coronaries, and thus needs to be considered as another important determinant of coronary flow. More specifically, coronary blood flow varies directly with the pressure across the coronary microcirculation, which can be essentially considered as the …
Coronary Blood Flow and Pressure Measurements | SpringerLink
https://link.springer.com/chapter/10.1007/978-3-030-95259-4_32
Note the yellow tracing of the wire pressure exceeds the red pressure of the guide catheter on the far-right side. Middle, damping of the pressure signals of both the aortic guide catheter and the guidewire pressure. The left side of the tracing is the baseline before damping and right side shows deep engagement and damping of both signs.
Understanding Coronary Blood Flow | Circulation
https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.105.617183
Coronary Blood Flow in Normal Subjects and Those With LVH In normal subjects, endocardial blood flow exceeds epicardial flow, so the ratio of endocardial to epicardial blood flow is ≈1.2:1. 2,3 It is generally held that this distribution matches the nutrient requirements of the endocardium where wall stress higher than that of the epicardium increases endocardial …
20.5 Circulatory Pathways – Anatomy & Physiology
https://open.oregonstate.education/aandp/chapter/20-5-circulatory-pathways/
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 | physiology | Britannica
https://www.britannica.com/science/coronary-circulation
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, the increased aortic pressure above the valves forces blood into the coronary arteries and thence into the musculature of the heart.
Coronary circulation - Wikipedia
https://en.wikipedia.org/wiki/Coronary_circulation
Coronary circulation is the circulation of blood in the blood vessels that supply the heart muscle. Coronary arteries supply oxygenated blood to the heart muscle. Cardiac veins then drain away the blood after it has been deoxygenated. Because the rest of the body, and most especially the brain, needs a steady supply of oxygenated blood that is free of all but the slightest interruptions, the …
Blood Flow Through the Heart - Austin Community College District
https://www.austincc.edu/apreview/EmphasisItems/Bloodflowthroughtheheart.html
Blood Throught the Heart Blood Flow Through the Heart Beginning with the superior and inferior vena cavae and the coronary sinus, the flowchart below summarizes the flow of blood through the heart, including all arteries, veins, and valves that are passed along the way. 1. Superior and inferior vena cavae and the coronary sinus 2. Rt. atrium 3.
Assessment of the Human Coronary Collateral Circulation
https://www.ahajournals.org/doi/full/10.1161/circulationaha.109.930651
Measurement of myocardial blood flow, defined as blood flow (mL/min) into a region relative to its mass (g), can be obtained by positron emission tomography and lately by myocardial contrast echocardiography (MCE) (see below for description of the technique). 57 Direct comparison of CFI p and absolute myocardial perfusion to a briefly and artificially …
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