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Dissertations / Theses on the topic 'Central aortic'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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1

Camacho, Fernando Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Statistical analysis of central aortic blood pressure parameters derived from the peripheral pulse." Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2006. http://handle.unsw.edu.au/1959.4/26215.

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With the rise in prevalence of cardiovascular (CV) disease, risk stratification is becoming increasingly important. Accurate characterization of the CV system is required, for which central aortic blood pressure (BP) parameters form an integral part. However, invasive measurement of central aortic BP parameters (aP) is difficult. Therefore, non-invasive methods to estimate aP from the radial pressure pulse (rPulse) have been proposed. To analyze accuracy of estimated aP (aPhat) and applicability in risk stratification and diagnosis, this study presents: (1) a novel representation of the rPuls
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2

Herajärvi, J. (Johanna). "Remote ischemic preconditioning in aortic surgery:Experimental studies with a porcine model." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526215877.

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Abstract During cardiac and aortic surgery, disturbance of the blood supply in the central nervous system occurs when the repair of aortic pathologies is performed or a bloodless operation field is needed in complex cardiac surgery. To enable the suitable operation environment, the technique named hypothermic circulatory arrest (HCA) has been utilized via heart-lung machine. In this method, the core temperature is lowered to the target temperature, after which blood circulation is halted for a certain period of time. A challenge is that the successful usage of HCA, however still involves the r
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3

Celestin, Carey Jr. "Computational Fluid Dynamics Applied to the Analysis of Blood Flow Through Central Aortic to Pulmonary Artery Shunts." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1972.

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This research utilizes CFD to analyze blood flow through pathways representative of central shunts, commonly used as part of the Fontan procedure to treat cyanotic heart disease. In the first part of this research, a parametric study of steady, Newtonian blood flow through parabolic pathways was performed to demonstrate the effect that flow pathway curvature has on wall shear stress distribution and flow energy losses. In the second part, blood flow through two shunts obtained via biplane angiograms is simulated. Pressure boundary conditions were obtained via catheterization. Results showe
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4

Haapanen, H. (Henri). "Preconditioning against ischemic injury of the central nervous system in aortic surgery:an experimental study in a porcine model with remote ischemic preconditioning and diazoxide." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219479.

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Abstract The repair of thoracoabdominal aortic aneurysms carries a substantial risk of ischaemic perioperative spinal cord injury. Although several protective methods have been developed, the risk of paraplegia has not been eliminated. Moreover, aortic aneurysms, including arch aneurysms, are complex clinical challenges requiring cerebral protection with hypothermic circulatory arrest (HCA). Hypothermia lowers the rate of cerebral metabolism and allows a temporary halt of the systemic circulation. However, there is still a risk for cerebral damage and a need for additional neuroprotective meth
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5

Freercks, Robert Jeremy. "The impact of vascular calcification on ambulatory and central aortic blood pressure in a South African dwelling dialysis population : a clinical, radiological and pathophysiological study of vascular health in a young prevalent dialysis population in a developing country." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11995.

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Includes abstract.<br>Includes bibliographical references.<br>In Sub-Saharan Africa, the prevalence of vascular calcification (VC) in CKD-5D is unknown. We undertook to determine the effect of ethnicity on VC, the risk factors for VC, the utility of abdominal X-ray (AXR) in predicting coronary calcium score (CCS) and the effect of VC on central aortic systolic pressure (CASP) and left ventricular mass index (LVMI) in South African dialysis patients. ... Black race significantly protects from VC in South African CKD-5D patients and warrants further study. The AXR is a useful screening tool for
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6

Leme, Gracieli Ana [UNESP]. "Insuficiência aórtica subcrônica e vias centrais relacionadas à regulação da ingestão de sódio." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/87756.

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Made available in DSpace on 2014-06-11T19:23:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-13Bitstream added on 2014-06-13T19:28:41Z : No. of bitstreams: 1 leme_ga_me_botib.pdf: 324429 bytes, checksum: c82395b2d9a3ec5093d8bf695db60161 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A insuficiência aórtica (IAo) é uma patologia que cursa com sobrecarga cardíaca de volume e consequente hipertrofia tipo excêntrica. As principais causas são febre reumática e forma degenerativa senil. O paciente com IAo se mantém assintomático por décadas e quando há
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7

Rojas, Salomón Soriano Ordinola. "Correção dos Aneurismas da Aorta Torácica e Toracoabdominal: Técnica de Canulação Central." Faculdade de Medicina de São José do Rio Preto, 2003. http://bdtd.famerp.br/handle/tede/226.

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Made available in DSpace on 2016-01-26T12:51:52Z (GMT). No. of bitstreams: 1 salomonrajas_tese.pdf: 1978465 bytes, checksum: ca15f774abde6ac24567685d49084f3a (MD5) Previous issue date: 2003-05-29<br>Introduction: The surgical treatment of the aneurysm of descending thoracic and thoracoabdominal aorta are related with risk of spinal cord ischemic, as well as, coagulation and renal function disorders. Among the spinal cord protection methods, there are liquor drainage, temporary bypass, intercostal arteries implant, deep hypothermia, selective cooling of spinal cord and drugs. Objective: The g
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8

Almonacid, Jorge Bruno, and Irma Jaquelina Rodríguez. "Educación a pacientes con aneurisma y disección de aorta." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería, 2004. http://bdigital.uncu.edu.ar/7882.

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En este trabajo de investigación se intenta saber el grado de interés y preocupación de los pacientes diagnosticados con aneurisma y disección aórtica en cuanto a su patología y su tratamiento. Es por ello que tiene como objetivo general determinar el tipo de educación y cuáles fueron las fuentes de información que recibieron dichos pacientes durante su fase de internación en el servicio de unidad coronaria del Hospital Central durante el año 2003, sobre cuidados y cambios de hábitos para evitar complicaciones y secuelas. Es un estudio cuantitativo y descriptivo, de corte transversal. Se tr
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9

Miguet, Daniel. "Etude randomisée de la surveillance hémodynamique par Swan Ganz versus PVC au cours de la chirurgie de l'aorte abdominale." Saint-Etienne, 1989. http://www.theses.fr/1989STET6019.

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10

Handberg, Amanda, and Hanna Enehov. "Patienters upplevelser relaterat till abdominalt aortaaneurysm och hur det påverkar det dagliga livet : En systematisk litteraturöversikt." Thesis, Malmö universitet, Malmö högskola, Institutionen för vårdvetenskap (VV), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-40558.

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Bakgrund: I Sverige avlider varje år cirka 600 män och 200 kvinnor till följd av ett brustet abdominalt aortaaneurysm. Mellan 1.5 och 4.0 procent av alla män över 65 år drabbas av ett abdominalt aortaaneurysm och sedan år 2015 erbjuds samtliga 65-åriga män screening för aortaaneurysm. De som diagnostiseras är således vanligen äldre personer, och i takt med stigande ålder ökar även risken att drabbas av andra sjukdomar. Patientgruppen kan därför vårdas på olika typer av vårdavdelningar, vilket gör att den grundutbildade sjuksköterskan kan möta dessa patienter på många
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11

Booysen, Hendrik Le Roux. "Pre-hypertension and central aortic haemodynamics." Thesis, 2015. http://hdl.handle.net/10539/18659.

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One quarter of any community may have normal (normal/high-normal) as opposed to optimal or hypertensive blood pressures (BP). These individuals may be at risk for a BP-related cardiovascular event, but do not qualify for BP-lowering therapy as those at risk are difficult to identify. In the present thesis I sought to determine whether aspects of non-invasively determined aortic BP may refine BPrelated cardiovascular risk assessment in those with brachial BP values within normotensive ranges. In 1169 participants from a community sample of African ancestry, 319 (27%)
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12

Magbool, Ahmed. "Blind Estimation of Central Blood Pressure Waveforms from Peripheral Pressure Signals." Thesis, 2020. http://hdl.handle.net/10754/664203.

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The central aortic blood pressure signal is an important source of information that contains cues about the cardiovascular system condition. Measuring this pulse wave clinically is burdensome as it can be only measured invasively with a catheter. As a result, many mathematical tools have been proposed in the past few decades to reconstruct the aortic pressure signal from the peripheral pressure signals that are usually easier to obtain noninvasively. At the distal level, the blood pressure signal is not directly useful since factors, such as length and stiffness of the arteries, play roles in
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13

"Pharmacogenetics of Bisoprolol Therapy and Effects on Central Aortic Pressure and Haemodynamics in Chinese Patients with Essential Hypertension." 2016. http://repository.lib.cuhk.edu.hk/en/item/cuhk-1292605.

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14

Shih, Yuan-Ta, and 石圜達. "Development of an Analysis System for the Estimation of Central Aortic Systolic Blood Pressure using Pulse Volume Recording." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/81286665870346964959.

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博士<br>中原大學<br>生物醫學工程研究所<br>100<br>Central ascending aortic systolic (SBP-C) and pulse (PP-C) blood pressure are the most important indexes for cardiovascular mortality in humankind. Currently commercial devices for assessing SBP-C and PP-C non-invasively are almost dependent on an expensively high-fidelity tonometer and an experienced operator for obtaining a wrist pressure waveform, such as SphygmoCor and HEM-9000AI. Then, the wrist pressure waveform was calculated by several different mathematic model for yielding SBP-C and PP-C. The accuracy of gener-alized transfer function (GTF) for predi
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15

"Comparison of High-Nitrate versus Low-Nitrate Diets on Cardiovascular Health in Post-Menopausal Women." Master's thesis, 2017. http://hdl.handle.net/2286/R.I.44019.

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abstract: Background. Despite research aimed at understanding the mechanisms of essential hypertension, instances of this condition continue to rise. Recent findings indicate that the administration of dietary nitrates, in the form of beetroot juice and other nitrate-rich vegetables, may offer anti-hypertensive effects in various study populations. Objective. This randomized, placebo-controlled, crossover trial sought to compare the effects of high-nitrate vegetable salads to the effects of low-nitrate canned vegetables on plasma nitrate/nitrite concentration, peripheral and central-aortic
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