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  • systolic blood pr
  • Burtt conducted studies that emphasized the changes in quantitative systolic blood-pressure. (wikipedia.org)
  • William Moulton Marston studied blood-pressure and noted increase in systolic blood pressure of 10 mm Hg or over indicated guilt through using the tycos sphygmomanometer, with which he reported 90-100% accuracy. (wikipedia.org)
  • Then in 1913 W.M. Marston determined systolic blood-pressure by oscillatory methods and his findings cite definite changes in blood pressure during the deception of criminal suspects. (wikipedia.org)
  • arteries
  • The aim of this study was to assess the effects of type 2 diabetes on blood flow velocities (BFVs) in the middle cerebral arteries and to determine the relationship between white matter hyperintensities (WMHs) on magnetic resonance imaging (MRI) and BFVs. (diabetesjournals.org)
  • In the uterine arteries the pulsatility index was highest on day + 2, after which it decreased successively to its lowest value, whereas the time-averaged maximum velocity reached its. (lu.se)
  • Animal research from the Russian Bion-M1 mission indicates duress of the cerebral arteries may induce reduced blood flow, thereby contributing to impaired vision. (wikipedia.org)
  • By compressing the surface veins, arteries and muscles, they force circulating blood through narrower channels. (wikipedia.org)
  • Blood pressure in the arteries supplying the body is a result of the work needed to pump the cardiac output (the flow of blood pumped by the heart) through the vascular resistance, usually termed total peripheral resistance by physicians and researchers. (wikipedia.org)
  • The up and down fluctuation of the arterial blood pressure is due to the pulsatile nature of the cardiac output and determined by the interaction of the stroke volume versus the volume and elasticity of the major arteries. (wikipedia.org)
  • coronary
  • We quantitated phasic epimyocardial microcirculatory coronary blood flow velocity patterns in the beating left ventricle. (ahajournals.org)
  • The impact of ligation of proximal side branches on blood flow and functional status of the internal thoracic artery in coronary anastomosis. (semanticscholar.org)
  • If one is to evaluate ischemia (reductions in coronary blood flow resulting from coronary artery disease) then individuals must be studied under "stress" conditions and comparisons require "stress-stress" comparisons. (wikipedia.org)
  • By 1963, Dr. William Bruce, aware of the tendency of people with coronary artery disease to experience angina (cardiac chest discomfort) during exercise, developed the first standardized method of "stressing" the heart, where serial measurements of changes in blood pressure, heart rate and electrocardiographic (ECG/EKG) changes could be measured under "stress-stress" conditions. (wikipedia.org)
  • atrial
  • The objective of this study was to assess the feasibility and accuracy of magnetic resonance (MR) velocity mapping to calculate pulmonary-to-systemic flow ratio (Qp : Qs) in patients with a suspected or diagnosed atrial-level shunt. (springer.com)
  • MR velocity mapping offers an accurate method to measure aortic and pulmonary artery volume flow that can be useful in the evaluation of atrial-level shunts, in order to establish a definite diagnosis and/or to quantify the Qp : Qs ratio. (springer.com)
  • Quantification of left-to-right atrial shunts with velocity-encoded cine nuclear magnetic resonance imaging. (springer.com)
  • The latter leads to increase risk of atrial fibrillation, which increases the risk of blood stasis (motionless). (wikipedia.org)
  • The result is that the left ventricle gets filled with blood during early ventricular diastole, with only a small portion of extra blood contributed by contraction of the left atrium (the "atrial kick") during late ventricular diastole. (wikipedia.org)
  • Eventually, the left ventricle requires the atrial kick to fill with blood. (wikipedia.org)
  • citation needed] When the mitral valve area goes less than 1 cm2, there will be an increase in the left atrial pressures (required to push blood through the stenotic valve). (wikipedia.org)
  • The loss of the atrial kick due to atrial fibrillation ( i.e. blood cannot flow into the left ventricle thus accumulating in the left atrium ) can cause a precipitous decrease in cardiac output and sudden congestive heart failure. (wikipedia.org)
  • Measurement
  • Measurement of peak systolic velocities (PSVs) in ICA has been used worldwide, and maximal PSV, defined between 1.25-1.4 m/s, was used delimitate stenosis to maximum 50%, sometimes with mandatory plaque or intimal thickening visible [ 7 ]. (hindawi.com)
  • Sieverding L, Jung W-I, Klose U, Apirz J. Noninvasive blood flow measurement and quantification of shunt volume by cine magnetic resonance in congenital heart disease. (springer.com)
  • peak
  • In these subjects, Peak Systolic Velocities in ICA correlated negatively with CBF in a majority of several brain areas, especially in mesial temporal area. (hindawi.com)
  • 50% and peak systolic velocities in ICA 0.7-1.3 m/s, should be offered an intensified pharmacotherapy to prevent stroke or silent cerebrovascular events. (hindawi.com)
  • Thrombosis
  • To evaluate the haemodynamic changes induced by flow diversion treatment in cerebral aneurysms, resulting in thrombosis or persisting aneurysm patency over time. (epfl.ch)
  • Relative flow velocity and WSS reduction in and of itself may result in aneurysm thrombosis in the majority of cases. (epfl.ch)
  • Compression stockings are recommended under the following conditions: Tired, aching legs occur when the blood flow slows down in the legs (can be an indicator of deep vein thrombosis). (wikipedia.org)
  • Deep vein thrombosis occurs when blood flow decreases (especially in the lower extremities), causing blood to pool in the legs and leading to blood clot (thrombus) formation. (wikipedia.org)
  • arterioles
  • The muscular contraction of arterioles is targeted by drugs that lower blood pressure (antihypertensives), for example the dihydropyridines (nifedipine and nicardipine), which block the calcium conductance in the muscular layer of the arterioles, causing relaxation. (wikipedia.org)
  • measurements
  • The approach has been thoroughly investigated using both simulations, flow rig measurements, and in-vivo validation against MR scans. (dtu.dk)
  • Measurements of left and right ventricular stroke corresponded closely with those of aortic (r=0.98) and pulmonary flow (r=0.99) respectively, and Qp : Qs flow ratios agreed with stroke volume ratios (r=0.92). (springer.com)
  • Antman EM, Marsh JD, Green LH, Grossman W. Blood oxygen measurements in the assessment of intracardiac left to right shunts: a critical appraisal of methodology. (springer.com)
  • citation needed] In classical mechanics, accurate measurements and predictions of the state of objects can be calculated, such as location and velocity. (wikipedia.org)
  • estimation
  • This includes synthetic aperture imaging using either spherical or plane waves with velocity estimation performed with directional beamforming or speckle tracking. (dtu.dk)
  • A method for extending the 2D TO method to 3D vector velocity estimation is presented and the implications for future vector velocity imagi- g is indicated. (dtu.dk)
  • maximal
  • One aneurysm rupturing 5 days after treatment showed also no change in flow pattern, and no change in the maximal inflow velocity. (epfl.ch)
  • cardiac
  • Changes in blood pressure in the very elderly could also affect PSV, mainly due to a frequently observed blood pressure decline after age 75, or decreased cardiac dynamic parameters. (hindawi.com)
  • In normal cardiac physiology, the mitral valve opens during left ventricular diastole, to allow blood to flow from the left atrium to the left ventricle. (wikipedia.org)
  • drainage
  • Changes in cerebral artery blood flow velocity after intermittent cerebrospinal fluid drainage. (bmj.com)
  • Lymphedema occurs when a body part swells due to an abnormal accumulation of lymph fluid, occurring when there is interference with the normal drainage of lymph fluid back into the blood, commonly swelling the arm, leg, neck or abdomen. (wikipedia.org)
  • cardiovascular
  • Analysis of the blood flow velocity in the forearm was made in comparison to established methods of estimating endothelial function, clinical markers of cardiovascular risk, the Framingham risk score and global atherosclerosis determined by whole body magnetic resonance angiography. (diva-portal.org)
  • changes
  • Neonatal cerebral blood flow velocity responses to changes in posture. (bmj.com)
  • We conclude that the blood circulation in the uterus and in the dominant ovary changes considerably during the menstrual cycle, whereas that in the non-dominant ovary shows no unequivocal changes. (lu.se)
  • Similar to other neuroimaging techniques such as functional magnetic resonance imaging (fMRI) and positron emission tomography (PET), fTCD is based on a close coupling between regional cerebral blood flow changes and neural activation. (wikipedia.org)
  • In 1921, John Augustus Larson criticized Marston's intermittent blood pressure method because emotional changes were so brief they could be lost. (wikipedia.org)
  • estimate
  • In 1854, he created a device called a sphygmograph, a mechanism consisting of weights and levers used to estimate blood pressure, and considered to be a forerunner of the modern sphygmomanometer. (wikipedia.org)
  • clinical
  • Several clinical examples of complex flow in e.g. bifurcations and around valves have been acquired using a commercial implementation of the method (BK Medical ProFocus Ultraview scanner). (dtu.dk)
  • Magnetic resonance velocity mapping: Clinical application of a new technique. (springer.com)
  • pressure
  • Results were limited to normotensive until their seventies, who developed late-onset hypertension with a subsequent blood pressure, pulse pressure, and ankle-brachial index growth. (hindawi.com)
  • As a result, the arterial pressure is increased, which causes more blood to return to the heart and less blood to pool in the feet. (wikipedia.org)
  • citation needed] When the mitral valve area goes below 2 cm2, the valve causes an impediment to the flow of blood into the left ventricle, creating a pressure gradient across the mitral valve. (wikipedia.org)
  • The cortisol levels will rise along with blood pressure. (wikipedia.org)
  • To adjust for this he modified the Erlanger sphygmograph to give a continuous blood pressure and pulse curve and used it to study 4,000 criminals. (wikipedia.org)
  • Medications such as labetalol may be required to lower the blood pressure until repair can occur. (wikipedia.org)
  • Circulation
  • Knee-high compression stockings are used not only to help increase circulation, but also to help prevent the formation of blood clots in the lower legs. (wikipedia.org)
  • Vierordt developed techniques and tools for the monitoring of blood circulation. (wikipedia.org)
  • patients
  • G6PD deficiency, absence of alpha-thalassemia, and hemolytic rate at baseline are significant independent risk factors for abnormally high cerebral velocities in patients with sickle cell anemia," Blood , vol. 112, no. 10, pp. 4314-4317, 2008. (hindawi.com)
  • Stroke
  • Qp : Qs ratios were calculated from both stroke volume data and flow data. (springer.com)
  • Battery-powered, it would use an RF link to a portable computer running a spectral analysis routine together with input from an oximeter (monitoring the degree of blood oxygenation, which a stroke might impair) to make the automatic decision to administer the drug. (wikipedia.org)
  • peripheral
  • Chronic peripheral venous insufficiency is when the veins cannot pump deoxygenated blood back to the heart. (wikipedia.org)
  • Any pathology which constricts blood flow, such as stenosis, will increase total peripheral resistance and lead to hypertension. (wikipedia.org)
  • reductions
  • Flow reductions under aneurysm-specific thresholds may, however, be the reason why some aneurysms remain completely or partially patent after flow diversion. (epfl.ch)
  • assays
  • PPD Laboratories' central lab performs cell-based assays and flow cytometry under good clinical laboratory practice (GCLP) and/or clinical laboratory improvement amendment (CLIA) regulations. (ppdi.com)
  • These data were collected using an atomic force microscope, and have subsequently been duplicated using a biomembrane force probe and in shear flow assays. (wikipedia.org)
  • ventricular
  • 3. A device according to claim 2, further comprising a pacemaker connected to the processor, the processor communicating the derived degree of oxygen saturation to the pacemaker to regulate heart rate and time of atrial and ventricular contractions in accordance with a predetermined level of blood oxygen saturation. (google.com.au)
  • In normal cardiac physiology, the mitral valve opens during left ventricular diastole, to allow blood to flow from the left atrium to the left ventricle. (wikipedia.org)
  • A normal mitral valve will not impede the flow of blood from the left atrium to the left ventricle during (ventricular) diastole, and the pressures in the left atrium and the left ventricle during ventricular diastole will be equal. (wikipedia.org)
  • The result is that the left ventricle gets filled with blood during early ventricular diastole, with only a small portion of extra blood contributed by contraction of the left atrium (the "atrial kick") during late ventricular diastole. (wikipedia.org)
  • known
  • In recent times, it has become one of the most commonly used tools in diagnosis of heart problems, as it allows non-invasive visualization of the heart and the blood flow through the heart, using a technique known as Doppler. (wikipedia.org)
  • Some experiments failed to produce shear stress that is now known to be critical to lengthen the lifetimes of catch bonds, while other experiments conducted under flow conditions too weak or too strong for optimal shear-induced strengthening of these bonds. (wikipedia.org)
  • NOx levels were higher than nitrite concentrations known to produce brown blood disease, lower productivity in trout, and other non-lethal impairments to trout growth and reproduction. (wikipedia.org)
  • He developed a correction term, which included inertial factors, for the flow velocity used in Stokes' calculations, to solve the problem known as Stokes' paradox. (wikipedia.org)
  • downstream
  • Upstream branches in the abdominal aorta lead to more complex flow patterns downstream, intensifying reverse and asymmetric flow patterns. (asme.org)
  • While able to float freely in the blood under normal circumstances, shear stress induced by inflammation causes leukocytes to attach to the endothelial vessel wall and begin rolling rather than floating downstream. (wikipedia.org)
  • Streamlines will converge just downstream of the diameter change, and a region of separated flow occurs from the sharp corner of the diameter change and extends past the vena contracta. (wikipedia.org)
  • tumors
  • Oseen's drag formulation can be used in connection with flow of fluids under various special conditions, such as: containing particles, sedimentation of particles, centrifugation or ultracentrifugation of suspensions, colloids, and blood through isolation of tumors and antigens. (wikipedia.org)
  • thus
  • IPCs are inflatable sleeves that fit over the legs and periodically inflate and deflate, helping to pump blood out of the legs and thus reduce the risk of blood clot formation. (clinicaltrials.gov)
  • Additional electromyography is helpful to reveal any decelerated nerve conduction velocity, and thus denervation of the concerned muscle. (wikipedia.org)
  • Pattern
  • It was also discovered that the blood spatter analyst whose analysis had triggered the arrest had falsified his credentials and did not work in the field of bloodstain pattern analysis at all. (wikipedia.org)
  • Dr. Robert Shaler, who served on a committee for The National Academy of Sciences to evaluate forensic methods, testified that blood spatter pattern analysis was found to be unreliable in their studies. (wikipedia.org)
  • oxygen
  • The invention also encompasses a device for measuring and controlling the level of a blood constituent, such as glucose or oxygen, and includes an implantable infrared source module for generating an output signal representative of the sensed infrared radiation. (google.com.au)
  • 2. A device according to claim 1, wherein the level of the blood constituent is the degree of oxygen saturation in hemoglobin. (google.com.au)
  • small
  • The diamond of odor for a composition research has disease sent aside for the consumer flow and only applications, focused to lay book, and to involve particular of figures and small cultures. (cdmw.de)
  • The first large-scale Venturi meters to measure liquid flows were developed by Clemens Herschel who used them to measure small and large flows of water and wastewater beginning at the end of the 19th century. (wikipedia.org)
  • determination
  • PPD ® Laboratories' central lab offers a complete menu of autoimmune, inflammatory and allergy testing, including high throughput of specific IgE blood (sIgE) testing, plasma protein determination and analysis of interleukins (IL). (ppdi.com)
  • pump
  • 7. A device according to claim 5, further comprising an insulin pump for dispensing doses of insulin in response to the level of blood glucose. (google.com.au)
  • further
  • 6. A device according to claim 5, further comprising an audible alarm which activates when the blood glucose level is determined by the processor to be in the hypoglycemic range. (google.com.au)
  • 9. A device according to claim 1, further comprising a channel having an internal circumference around which are arranged the source and the detector, the channel being dimensioned to receive a blood vessel therein and to locate the vessel in proximity to the source and detector. (google.com.au)
  • 12. A device according to claim 1 wherein the processor is extracorporeal, the device further comprising a telemetry transmitter connected to the output signal for transmitting the spectral information about the blood extracorporeally to the extracorporeal processor. (google.com.au)
  • 13. A device according to claim 1, further comprising a telemetry transmitter connected to the processor for transmitting the derived level of the blood constituent to a phone. (google.com.au)
  • length
  • Brown's Creek is a 9.7-mile-long (15.6 km) stream which originates about 5.5 miles northwest of the city of Stillwater and flows south for about half its length then east to its confluence with the St. Croix River just north of Stillwater in Washington County, Minnesota, United States. (wikipedia.org)
  • section
  • In 1999, Browns Creek underwent a re-route in the fall of 1999 that shortened this section of the stream from 5,130 feet to 2,000 feet in order to lower water temperatures by avoiding water warming in previous meander through a wetland just north of Lake McKusick, increasing stream velocity and decreasing organic matter in the stream. (wikipedia.org)
  • It is the ratio between the area of the jet at the vena contracta to the area of the contracted flow section Cc = Area at vena contracta/ Area of orifice The typical value may be taken as 0.64 for a sharp orifice (concentric with the flow channel). (wikipedia.org)
  • increase
  • citation needed] When the mitral valve area goes less than 1 cm2, there will be an increase in the left atrial pressures (required to push blood through the stenotic valve). (wikipedia.org)
  • cannot
  • To compare the geko with IPCs, this study will randomly assign trauma patients who cannot receive blood thinners for blood clot prevention to either IPCs or geko. (clinicaltrials.gov)
  • important
  • The characterization of blood flow is important to establish links between the hemodynamics and the occurrence of cardiovascular diseases. (asme.org)
  • high
  • Trauma patients are at a high risk of developing blood clots in the legs (deep vein thrombosis - DVT), which can travel to the lungs and cause serious health consequences. (clinicaltrials.gov)
  • devices
  • The main goal is to determine the feasibility of doing a larger study which would compare the efficacy of these devices in preventing blood clots. (clinicaltrials.gov)
  • area
  • The creek's name is from the founder of the first settlement in the Stillwater area, Joseph R. Brown, where Brown's Creek (then Pine Creek) flows into the St. Croix River. (wikipedia.org)
  • system
  • This invention is an implantable sensor and system capable of measuring, controlling, monitoring and reporting blood constituent levels. (google.com.au)
  • environment
  • For example, most early experiments were conducted in 96 well plates, an environment that does not provide any flow. (wikipedia.org)