assessment of the autonomic control of the cardiovascular system by frequency domain approach
Tài liệu Báo cáo khoa học: Control of the coagulation system by serpins Getting by with a little help from glycosaminoglycans pptx
Ngày tải lên :
20/02/2014, 02:21
... intermediate by the unique action of the serpin, whereby the RCL of the serpin inserts into the major A b-sheet causing the protease to be rapidly translocated from the top to the bottom of the inhibitor ... involves the attack of the protease on the P1-P1¢ bond in the reactive centre loop (RCL) of the serpin [5] The catalysis of the peptide bond cleavage appears to be arrested at the acyl intermediate by ... polymers of serpins, where the insertion of another molecule’s RCL takes place [8] Both of these result in the irreversible inactivation (generally) of the serpins, and, in the case of the anticoagulant...
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The role of hydrogen sulphide in the cardiovascular system emphasis on haemorrhagic shock
Ngày tải lên :
13/09/2015, 21:24
... interplay between the cardiovascular system, the autonomic nervous system and the renal (renin-angiotensin-aldosterone) system Mean arterial pressure (MAP) is determined by the total blood volume, ... Biosynthesis of H2S 24 1.2.2 Regulation of H2S biosynthesis 25 1.2.3 Metabolism of H2S .26 1.2.4 Mechanisms of action of H2S .27 1.2.5 H2S and the cardiovascular ... MAP is regulated at the systemic level predominantly by the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) Blood flow may also be regulated at the tissue level (local...
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Role of hydrogen sulfide in the cardiovascular system implications for treatment of cardiovascular diseases
Ngày tải lên :
01/10/2015, 17:27
... function of these channels in the heart Therefore, the effect of H2S on APD is probably attributed to the opening of KATP channels86 H2S is capable of opening KATP channels directly87, 88 Furthermore, ... probably reflect the status of H2S activity Whether such changes in H2S level are the causes or consequences of these diseases warrants further investigations 1.3.5.1 Effect of H2S on atherosclerosis ... to that of SNP was found 77, 82 Nevertheless, the formation of HNO as a result of H2S and NO or SNP interaction warrants further in depth studies to be fully resolved In the vascular system, ...
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Báo cáo khoa học: Modulation of the endocannabinoid system by focal brain ischemia in the rat is involved in neuroprotection afforded by 17b-estradiol pdf
Ngày tải lên :
23/03/2014, 07:20
... neuropathologic alterations of the endocannabinoid system, such those detected after MCAo, are instrumental for its modulation by estrogen The modulation of the endocannabinoid system by E2 in the ischemic ... the ischemic insult, 4468 resulted in a significant reduction of brain infarct volume produced by h of MCAo followed by 22 h of reperfusion The neuroprotection afforded by E2 was reverted by the ... into the internal carotid artery, approximately 18 mm from the carotid bifurcation, until mild resistance was felt, thereby indicating occlusion of the origin of the MCA in the Willis circle The...
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THE CARDIOVASCULAR SYSTEM – PHYSIOLOGY, DIAGNOSTICS AND CLINICAL IMPLICATIONS pot
Ngày tải lên :
28/03/2014, 09:20
... with use of the first derivative graph Functions of cardiovascular system to be evaluated on the basis of heart cycle phase analysis The complex of the functions of the cardiovascular system is ... not only by the configuration of the valves but also the mechanism of the contraction of the heart chambers that consists of three phases Phase one among them is the contraction of the septum ... presets the velocity of the blood flow during the blood ejection phase Therefore, the initial velocity of the blood flow in the aorta depends on the degree of the myocardium tension The second...
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Báo cáo hóa học: " Image Quality Assessment Using the Joint Spatial/Spatial-Frequency Representation" potx
Ngày tải lên :
22/06/2014, 23:20
... using PWD is the choice of w(r, s) and h(k, ) The size of the first window, w(r, s), is dictated by the resolution required in the spatial -frequency domain The spectral shape of the window should ... instance, the region labeled A in (f) represents the mapping of the region A in the real image spectrum (a) on the spatial -frequency domain of the full -domain PWD A potential drawback of this approach ... vq ) In the spatial -frequency domain, the full -domain PWD is, by definition, of periodicity and symmetric with respect to the origin, as the WVD of a real image It is completely specified by: FPW...
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THE CARDIOVASCULAR SYSTEM – PHYSIOLOGY, DIAGNOSTICS AND CLINICAL IMPLICATIONS pot
Ngày tải lên :
27/06/2014, 09:20
... with use of the first derivative graph Functions of cardiovascular system to be evaluated on the basis of heart cycle phase analysis The complex of the functions of the cardiovascular system is ... not only by the configuration of the valves but also the mechanism of the contraction of the heart chambers that consists of three phases Phase one among them is the contraction of the septum ... presets the velocity of the blood flow during the blood ejection phase Therefore, the initial velocity of the blood flow in the aorta depends on the degree of the myocardium tension The second...
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Introduction to the Cardiovascular System - part 1 doc
Ngày tải lên :
11/08/2014, 00:20
... of the heart closely matches the output of the other so that there are no major blood volume shifts between the pulmonary and systemic circulations Second, most of the major organ systems of the ... the overall arrangement of the cardiovascular system First, the right and left sides of the heart, which are separated by the pulmonary and systemic circula- tions, are in series with each other ... leaving the lungs enters the left atrium by way of the pulmonary veins Blood then flows from the left atrium into the left ventricle The left ventricle ejects the blood into the aorta, which then...
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Introduction to the Cardiovascular System - part 2 pdf
Ngày tải lên :
11/08/2014, 00:20
... (i.e., the mean electrical vector) for all of the individual depolarization waves The fifth rule states that the amplitude of the wave recorded by the ECG is directly related to the mass of the muscle ... shows the septum and free walls of the left and right ventricles; each of the four vectors is depicted as originating from the AV node The size of the vector arrow is related to the mass of tissue ... through the AV node; therefore, the ventricular rate (as determined by the frequency of QRS complexes) may be only half of the atrial rate In atrial fibrillation, the SA node does not trigger the...
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Introduction to the Cardiovascular System - part 3 pdf
Ngày tải lên :
11/08/2014, 00:20
... the total energy of the blood within the ventricle exceeds the total energy of blood within the aorta The total energy of the blood is the sum of the pressure energy and the kinetic energy; the ... (EDV – ESV) at the end of filling, and ESV is the minimal volume (i.e., residual volume) of the ventricle found at the end of ejection The width of the loop, therefore, represents the difference ... The slope of the tangent of the passive pressure-volume curve at a given volume represents the reciprocal of the ventricular compliance The slope of the normal compliance curve is increased by...
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Introduction to the Cardiovascular System - part 5 pot
Ngày tải lên :
11/08/2014, 00:20
... to the right, thereby reducing the firing rate at any given mean arterial pressure This resetting of the baroreceptor response can occur at the level of the receptors themselves as well as in the ... time because the cardiovascular system is essentially a closed system (The cardiovascular system, strictly speaking, is not a closed system because fluid is lost through the kidneys and by evaporation ... Describe the roles of the following regions of the brain in the autonomic regulation of cardiac and vascular function: medullary cardiovascular centers,” hypothalamus, and cortex Describe the origin...
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Introduction to the Cardiovascular System - part 6 docx
Ngày tải lên :
11/08/2014, 00:20
... complex interactions with other control mechanisms that serve to reinforce or inhibit the actions of the other control mechanisms For example, activation of sympathetic nerves either directly or indirectly ... SUMMARY OF IMPORTANT CONCEPTS • Autonomic regulation of the heart and vasculature is primarily controlled by special regions within the medulla oblongata of the brainstem that contain the cell ... 7-7) Therefore, most of the blood flow to the myocardium occurs during diastole The reason that coronary flow is influenced by the cardiac cycle is that during systole, the contraction of the myocardium...
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Introduction to the Cardiovascular System - part 7 pot
Ngày tải lên :
11/08/2014, 00:20
... determined by the physical properties of the barrier (i.e., size and number of “pores” and the thickness of the capillary barrier), and therefore it represents the permeability of the capillaries ... drains into the hepatic portal vein, which supplies approximately 75% of the hepatic blood flow The remainder of the hepatic blood flow is supplied by the hepatic artery, which is a branch of the celiac ... between the blood and the environment to help regulate body temperature Therefore, the cutaneous circulation is under the control of hypothalamic thermoregulatory centers that adjust the sympathetic...
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Introduction to the Cardiovascular System - part 8 pot
Ngày tải lên :
11/08/2014, 00:20
... of this norepinephrine comes from sympathetic nerves Normally, most of the norepinephrine released by sympathetic nerves is taken back up by the nerves (neuronal reuptake); however, some of the ... and cardiac output, thereby partially restoring arterial pressure Most of the compensatory responses occur regardless of the cause of hypotension; however, the ability of the heart and vasculature ... sympathetic nerves constrict the renal vasculature Exercise activates several different hormonal systems that affect cardiovascular function Many of the hormonal systems are activated by sympathetic...
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Introduction to the Cardiovascular System - part 9 ppsx
Ngày tải lên :
11/08/2014, 00:20
... (i.e., antiinflammatory) The mechanism of many of these actions of NO involves the formation of cGMP When NO is formed by an endothelial cell, it readily diffuses out of the cell and into adjacent ... a pressure gradient along the length of the vessel, it is actually the difference in the total energy of the flowing blood along the length of a vessel that determines the flow at any given resistance ... its two ends The KE is constant along the length of the vessel because the velocity is the same at every point along the vessel Because the total energy must decline along the length of vessel due...
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Introduction to the Cardiovascular System - part 10 pot
Ngày tải lên :
11/08/2014, 00:20
... is the product of force and distance Therefore, the work done to move an object of a given mass is the force applied to the object times the distance that the object moves In the case of the ... volume of fluid, work is defined as the product of the volume of fluid and the pressure required to move the fluid Stroke work (SW) refers to the work done by the ventricle to eject a volume of blood ... determined by the volume (V) of fluid within the interstitium and the compliance (C) of the interstitium Interstitial compliance is defined as the change in interstitial fluid volume (⌬Vi) divided by the...
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Introduction to the Cardiovascular System - part 3 pot
Ngày tải lên :
11/08/2014, 11:22
... the total energy of the blood within the ventricle exceeds the total energy of blood within the aorta The total energy of the blood is the sum of the pressure energy and the kinetic energy; the ... (EDV – ESV) at the end of filling, and ESV is the minimal volume (i.e., residual volume) of the ventricle found at the end of ejection The width of the loop, therefore, represents the difference ... The slope of the tangent of the passive pressure-volume curve at a given volume represents the reciprocal of the ventricular compliance The slope of the normal compliance curve is increased by...
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Introduction to the Cardiovascular System - part 4 docx
Ngày tải lên :
11/08/2014, 11:22
... example, if the radius of the ventricle is increased by 50%, the wall stress needed by the myocytes to eject blood at a normal pressure will be increased by about 50% On the other hand, if the ventricular ... parallel arrangement of resistances, the reciprocal of the total resistance is equal to the sum of the reciprocals of the individual resistances For example, the total resistance (RT) of three parallel ... the aortic and pulmonic valves to close The volume of blood remaining in the ventricle at the end of ejection is the end-systolic volume The first heart sound (S1) originates from closure of the...
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Introduction to the Cardiovascular System - part 6 pps
Ngày tải lên :
11/08/2014, 11:22
... complex interactions with other control mechanisms that serve to reinforce or inhibit the actions of the other control mechanisms For example, activation of sympathetic nerves either directly or indirectly ... SUMMARY OF IMPORTANT CONCEPTS • Autonomic regulation of the heart and vasculature is primarily controlled by special regions within the medulla oblongata of the brainstem that contain the cell ... 7-7) Therefore, most of the blood flow to the myocardium occurs during diastole The reason that coronary flow is influenced by the cardiac cycle is that during systole, the contraction of the myocardium...
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