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Chapter 6 The Coronary System and Associated Medical Devices BME 501 T. K. Hsiai, MD, PhD, FACC
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Introduction Ascending Aorta
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Coronary Artery Diagram of the heart showing the left and right coronary arteries arising from the aorta and branching over the surface of the heart.
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Diagnosing Obstructive Coronary Artery Disease Maximum intensity projections (slab thickness, 3 mm) reconstructed from multislice spiral computed tomograms. Upper left, Left anterior descending coronary artery (LAD). Upper right, Reconstruction plane of upper left (horizontal long axis near the cranial surface of the heart). The computed tomographic (CT) image is oriented as if the plane were viewed from a caudal aspect. Lower left, Right coronary artery (RCA). The circumflex coronary artery (LCX) is only partially imaged. Lower right, Reconstruction plane of lower left (short axis at the level of the atrioventricular sulcus). The CT image is oriented as if the plane were viewed from the apex. AIVV = anterior interventricular vein; AO = aorta; D1 and D2 = first and second diagonal branches; LV = left ventricle; RV = right ventricle; RVOT = right ventricular outflow tract. Coronary segments: right coronary artery (proximal, 1; mid, 2; distal, 3), posterior descending artery (4), left main coronary artery (5); LAD (proximal, 6; mid, 7; distal, 8); first diagonal branch (9); circumflex coronary artery (proximal, 10; distal, 11); first obtuse marginal branch (12).
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Coronary Artery Electron Beam CT
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Coronary Artery Disease Coronary Heart Disease (CAD) Function of heart is to supply the blood to the whole body by pumping. Whereas coronary arteries come out of the aorta and supply the blood and feed the heart muscles themselves. The main coronary arteries lie down on the surface of the heart and the small arteries enter the cardiac muscle mass. It is the most common cause of the cardiovascular disability and death. Coronary heart disease is a state in which the heart muscle not gets ample amount of blood because of disruption in its blood supply. Depending on the extent of disruption in its blood supply, symptoms appear from a mild chest pain to a full-scale heart attack Coronary Thrombosis There is sudden blocking of one of the arteries or its branches and then the supply of blood to the heart is affected partially or completely. The sudden blocking takes place due to the deposit of clot in an already narrow artery. Due to lack of blood supply, heart attack takes place with pain in the chest and arms and there maybe perspiration.
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Atherosclerosis Atherosclerosis is a type of arteriosclerosis, and is one of the leading cause of illness and death in the United States and most other Western countries. It involves the thickening and hardening of arterie, and usually affects large and medium-sized arteries. Symptoms
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