ATHEROSCLEROSIS & other HART-VESSLES DISEASES V. Voloshyn (By Ya.Ya. Bodnar et al., Rubin & Farber, 1 Serov et al.) Atherosclerosis is a disease of large and medium-sized arteries that results in the progressive accumulation within the intima of smooth muscle cells and lipids. 2 The major complications of atherosclerosis, including ischemic heart disease, myocardial infarction, stroke, and gangrene of the extremities, account for more than half of the annual mortality in the United States. 2 According to definition of WHPO?, atherosclerosis is the “varied combinations of changes of internal shell of arteries, which show up as the nidus (hearths) deposits of lipids, complex compounds of carbonhydratess, elements and matters of blood, formations of connecting tissue and calcium deposits”. 3 2 Risk Factors: Hypertension; High cholesterol level in blood; Cigarette smoking; Diabetes; Increasing age and male sex. 4 Pathogeny of atherosclerosis Nosotropic essence of atherosclerosis consists in the hearths deposits in intima of arteries socalled atherogenic lipoproteins. Lipoproteides show itself spherical particles which consist of nucleus and external shell. Triglyceride and ethers of cholesterol formed the complement of nucleus. The external shell consist of the apoproteins, phospholipids and unethered cholesterol. 5 5 2 Cholesteryl ester 16 % High density lipoproteins (HDL) Apoprotein 55 % low density lipoproteins (LDL) Cholesteryl ester 45 % Very low density lipoproteins (VLDL) A t h e r o g e n i c antiAthe roge nic (LDL) is the form of lipid in the plasma that has been most closely associated with accelerated atherosclerosis chylomicrons 6 7 Pathogeny of atherosclerosis They considered lipoproteids of very low and low density are atherogenic, which contain the large supply of cholesterol (to 45%) and albumen a little. Lipoproteids of high density, opposite, have a lot of albumen (55%) and comparatively little cholesterol (16%). They execute a antiaterogenic function, that prevent development of atherosclerosis. 7 Pathogeny of atherosclerosis In the modern time well-proven that not natively lipoproteids of low density act leading part in genesis of atherosclerosis, but them modified varieties: a) glucolisic lipoproteids (which added glucose); b) peroxide-modified lipoproteids, which appeared under act of free radicals and products of peroxide oxidization of lipids; c) autoimmune complexes of lipoproteidantibody; d) lipoproteids, which suffered partial degradation under act of proteolitic enzymes. 2 8 9 The vascular endothelium interacts with macro-molecules and formed elements of the blood and plays a role in the transport of plasma proteins. The arterial smooth muscle cell is important in (1) the control of artery wall tone, (2) maintenance and repair, (3) the metabolism of various blood-borne substances, including lipids, and (4) the secretion of ! various cytokines. The mononuclear phagocyte has many functions, including the uptake of low-density lipoproteins (LDL) and the secretion of various hydrolases and cytokines. Lymphocytes and neutrophils are involved in the response to tissue injury and may participate in auto- I immune reactions, such as may occur with viral infections in vessels of transplanted organs. 9 2 Phases of ATHEROSCLEROSIS: till lipid; lipid blots (ribbons); lipoidosis or atheromatic plate; liposclerosis or liposclerotic plates; stage of complication (clots, calcifications, ulcers ...) 10 2 11 2 Hystogenesis of atherosclerosis (scheme) 12 13 Hystogenesis of atherosclerosis 13 2 apo B, E receptors rubbish receptor rubbish 14 2 Endothelial cell Smooth muscle cell Lipid-laden macrophage Extracellular lipid Necrotic cell 15 2 16 2 The fibrous cap is a layer of fibrous connective tissue that is much thicker and less cellular than the normal intima and contains fat-filled macrophages (foam cells) and smooth muscle cells. The atheroma is a necrotic mass of lipid that forms the middle part of the characteristic lesion of atherosclerosis. The term atheroma originally referred only to the fatty mass, but it is now used for the entire atherosclerotic lesion. 17 2 Pathoanatomical research of aorta scissors 18 2 19 2 20 2 21 2 22 Clinic morphological forms and displays of atherosclerosis Clinic morphological forms Clinic morphological displays Acute Chronic Removing a layer by the layer of mid-dle shell from intima or adventi-tias Atrophy of breastbone and (розшаровуюча aneurysm). Rup-tures vertebral bodies from and bleeding. Thrombosis. Atherosclerosis of aorta pressure at presence of Thrombembolism with develop-ment aneurysm (sack, of heart attacks and gangre-ne. Acute cylindrical, fusiform) ischemic heart trouble (stenocardia, heart attack of myocardium). Chronic ischemic heart trouble Atherosclerosis of the Acute ischemic heart trouble (stenocardia, (cardiosclerosis, chronic coronary arteries heart attack of myocardium). aneurysm of heart) A transitory ischemia – Atherosclerosis of the Haematoma, hemorragic infiltration, atrophy of brain, cerebrum arteries infarcts of cerebrum oligophrenia, cysts Atherosclerosis of the Atherosclerotic Infarcts of kidneys kidney's arteries nephrosclerosis Atherosclerosis of the Atrophy of mucous plate of Abdominal quinsy, gangrene, peritonitis intestine arteries intestine 23 Atherosclerosis of the Atrophy of muscles, Gangrene lower limb arteries alternating lameness 2 Atherosclerosis of aorta 24 2 Atherosclerosis of cerebrum arteries 25 2 Gangrene of foot 26 2 Atherosclerotic nephrosclerosis 27 2 Hypertensive illness Hypertensive illness is one of the most widespread diseases of vessels& heart system, which is characterized by stable essence hyperpressure (systole – higher 140 mm.Hg, and diastole – higher 90 mm.Hg) with the defeat of organs-targets. 28 Glossary 2 Arterial Hyperpressure (according to definition of Committee of experts of WHPO, is constantly enhanceable systole and/or diastole arterial pressure. essence hypertension is enhanceable arterial pressure in default of reliable cause of its increasing Secondary hypertension (symptomatic) is the hypertension, reason of which can be found out. 29 2 Etiology of hypertensive illness Etiology of hypertensive illness exactly is not found out. Sympatic hyperactivity is one of the strongest factors of development of essence hypertension. This state is reflected on the function of some organs which can be considered the targets of the sympatic influencings. Except for a heart, arterioles, veins and kidneys belongs here . 30 2 Stages of development of hypertensive illness Flowing of hypertensive illness can be of benign and malignant. In first case select three clinic-morphological stages: till clinical, or transitory; stage of widespread changes of arteries, or organic; stage of the secondary changes, or organ . 31 2 Defeat of vessels at hypertensive illness 32 2 Defeat of heart at hypertensive illness 33 2 Primary wrinkled kidney 34 2 Cerebro-vascular illness 35 2 Ischemic heart trouble Ischemic heart trouble is acute or chronic disfunction of cardiac muscle which arises up as a result of the relative or absolute diminishing of coronal blood supplying of myocardium by arterial blood. (The experts committee of WHPO) 36 2 Classification of ischemic heart trouble (WHPO, 1979) Coronal oxymortia. Stenocardia Infarct of myocardium Post-infarctic cardiosclerosis Violation of cardiac rhythm Cardiac insufficiency 37 2 Heart attack of myocardium 38 2 Infarct of myocardium classification According to time of origin Primary According to localization According to spread According to passing Subendocardial Smallnidus Stage of ischemic dystrophy Intramuralic Intrawall Largenidus Repeated (thou 8 weeks after first) Subepicardial Extensive Recurrent (to 8 weeks after first) Stage of necrosis Stage of organization Transmuralic Transwall Cardiosclerosis 39 2 Acute heart attack 40 2 Cardiosclerosis 41 2 The end 42