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A pathologic role for angiotensin II and endothelin-1 in cardiac remodelling and ischaemia and reperfusion injury in a rat model of the metabolic syndromeSmith, Wayne 03 1900 (has links)
Thesis (MScMedSc (Biomedical Sciences. Medical Physiology))--University of Stellenbosch, 2006. / Introduction: Obesity, which is implicated in the development of the metabolic
syndrome (MS) is reaching epidemic proportions worldwide. MS significantly
increases the risk of developing cardiovascular disease, which includes
coronary artery disease. The current absence of animal models of diet induced
obesity and the MS makes the investigation of the cardiovascular
consequences of MS virtually impossible. As a result the effects of the MS on
cardiac function, morphology and susceptibility to ischaemia are not well
understood.
Aims: We set out to: 1) develop and characterize a rodent model of dietinduced
obesity and the MS, 2) investigate the susceptibility of hearts from
these animals to ischaemia/reperfusion induced injury and, 3) determine
whether angiotensin II (Ang II) and endothelin-1 (ET-1) plays a role in cardiac
remodelling and/or the severity of ischaemia and reperfusion injury in this
model.
Methods: Male Wistar rats were fed a standard rat chow diet or cafeteria diet
(CD) for 16 weeks. After the feeding period rats were sacrificed and blood and
myocardial tissue samples were collected to document biochemical changes in
these animals. Hearts were perfused on the isolated working rat heart perfusion
apparatus to assess myocardial mechanical function before and after
ischaemia. In a separate series of experiments, hearts underwent coronary
artery ligation to determine the incidence and duration of ventricular arrhythmias
during ischaemia and reperfusion, using electrocardiography. To assess a possible link between myocardial remodelling and ischaemia/reperfusion injury
and myocardial Ang II and ET-1 content, we also measured these peptides
under basal conditions and during ischaemia. Two-dimensional targeted Mmode
echocardiography was used to assess in vivo myocardial mechanical
function in control and obese rats.
Results: After 16 weeks on the CD, obese rats satisfied the World Health
Organization (WHO) criteria for the MS by having visceral obesity, insulin
resistance, dyslipidaemia and an elevated systolic blood pressure, compared to
control rats. Circulating Ang II levels, but not ET-1 levels, were elevated in CD
fed rats. Obese rats had cardiac hypertrophy and ex vivo basal myocardial
mechanical function was depressed in the CD fed rat hearts compared to
control rat hearts. CD fed rat hearts had poorer aortic output (AO) recoveries
compared to hearts from control rats. These hearts also had a higher incidence
and duration of reperfusion arrhythmias. No such functional differences were
seen in the in vivo experiments. No differences in basal or ischaemic
myocardial Ang II and ET-1 levels were seen in either group.
Conclusion: We have developed and characterized a model of diet-induced
obesity and the MS. Obesity is associated with cardiac hypertrophy and an
increased myocardial susceptibility to ischaemia and reperfusion injury in our
model. The hearts from obese rats were also more prone to reperfusion
ventricular arrhythmias. As myocardial function was only poorer in the ex vivo
obese animal experiments, our data suggests that the obesity associated
changes in function observed in the ex vivo studies may be related to the absence of circulating substrates or factors, which are essential for their normal
mechanical function.
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Application of laser doppler vibrocardiography for human heart auscultationKoegelenberg, Suretha 04 1900 (has links)
Thesis (MScEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: This thesis investigates the feasibility of the laser Doppler vibrometer (LDV) for
use in the autonomous auscultation of the human heart. As a non-contact measurement
device, the LDV could become a very versatile biomedical sensor. LDV,
stethoscope, piezoelectric accelerometer (PA) and electrocardiogram (ECG) signals
were simultaneously recorded from 20 volunteers at Tygerberg Hospital. Of
the 20 volunteers, 17 were confirmed to have cardiovascular disease. 3 patients with
normal heart sounds were recorded for control data.
The recorded data was successfully denoised using soft threshold wavelet denoising
and ensemble empirical mode decomposition. The LDV was compared to
the PA in common biomedical applications and found to be equally accurate. The
heart sound cycles for each participant were segmented using a combination of ECG
data and a simplicity curve. Frequency domain features were extracted from each
heart cycle and input into a k-nearest neighbours classifier. It was concluded that
the LDV can form part of an autonomous, non-contact auscultation system. / AFRIKAANSE OPSOMMING: Hierdie tesis ondersoek die haalbaarheid daarvan om die laser Doppler vibrasiemeter
(LDV) vir die outonome beluistering van die menslike hart te gebruik. As
'n kontaklose meettoestel kan die LDV werklik 'n veelsydige biomediese sensor
word. Twintig vrywilligers by die Tygerberg Hospitaal se LDV-, stetoskoop-, piësoelektriese
versnellingsmeter (PV)- en elektrokardiogram (EKG) seine is gelyktydig
opgeneem. Uit die 20 vrywilligers was daar 17 bevestigde gevalle van kardiovaskulêre siektes. Die data van drie pasiënte met normale hartklanke is as kontroledata
opgeneem.
Geraas is suksesvol uit die opgeneemde data verwyder deur 'n kombinasie van
sagtedrempelgolf en saamgestelde empiriese modus ontladingstegnieke. Die LDV
was vergelyk met die PV vir algemene biomediese gebruike en daar was gevind
dat dit vergelykbare akkuraatheid het. Die hartklanksiklusse van elke deelnemer
is gesegmenteer deur EKG data en 'n eenvoudskromme te kombineer. Frekwensiegebiedskenmerke
is uit elke hartsiklus onttrek en in 'n k-naastebuurpunt klassifiseerder ingevoer. Daar is tot die gevolgtrekking gekom dat die LDV deel van 'n
outonome, kontaklose beluisteringstelsel kan uitmaak.
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Evaluation of high-throughput methodology for multi-gene screening in patients with Non-Alcoholic Fatty Liver Disease (NAFLD)Fisher, Leslie Reginald 12 1900 (has links)
Thesis (MScMedSc)--Stellenbosch University, 2011. / ENGLISH ABSTRACT: Non-Alcoholic Fatty Liver Disease (NAFLD) is the most prevalent chronic liver disease in Western countries and is considered the hepatic manifestation of the Metabolic Syndrome (MetS). Its heterogeneous nature ranges from hepatic steatosis through steatohepatitis to advanced fibrosis and cirrhosis where the ingestion of significant amounts of alcohol has been excluded. The disease profile of NAFLD and its necro-inflammatory subset Nonalcoholic Steatohepatitis (NASH) were described in the parent study, which provided a clinically well-characterised patient cohort for the present investigation. South African patients with NASH had significantly higher mean serum cholesterol and triglyceride levels than those with fatty liver only.
The objective of this study was to implement a high-throughput real-time polymerase chain reaction (PCR) method in our laboratory to enable the assessment of cardiovascular genetic risk factors in NAFLD patients. The specific aims were to determine the clinical utility and perform analytical validation of each mutation included in the multi-gene cardiovascular disease (CVD) screening assay. The Pathology Supported Genetic Testing (PSGT) concept developed at our department provides a practical approach to personalized medicine. The CVD multi-gene screen analyses key metabolic pathways relating to atherogenic dyslipidaemia, chronic inflammation, hypercoagulation and iron dysregulation implicated in insulin resistance, which is known to be a universal factor in the pathogenesis of NAFLD. Deleterious low-penetrance mutations in the APOE (APOE2 and E4 alleles), MTHFR (677C>T and 1298A>C), F2 (20210G>A), FV (1691G>A, Leiden) and HFE (C282Y and H63D) genes were included for analysis due to their important role as genetic contributors to these biological processes. A total of 178 patients diagnosed with NAFLD and 75 controls were studied using direct DNA sequencing and a RT-PCR system for mutation detection. In addition, two patients with high ferritin levels were included as case studies. A significant association was found between HFE mutations and elevated Alanine Transaminase (ALT) levels in the NAFLD population (p = 0.04). This discovery is interpreted as the identification of a subset of patients at greater risk of developing progressive liver damage who would benefit most from genetic testing to direct more aggressive therapy at an earlier stage. The necessity of an integrative, systems-based network approach was demonstrated to more accurately distinguish between Hereditary Haemochromatosis (HH) and Insulin Resistance-associated Hepatic Iron Overload (IR-HIO) syndrome in obese patients. The PSGT approach to personalized medicine facilitates diagnosis of CVD subtypes, prevention of cumulative risk and the formulation of gene-based intervention programs tailored to the needs of the patient.
These findings support the clinical utility of the CVD multi-gene test to guide chronic disease risk management in patients with NAFLD. The HFE mutation detection component of this test is of particular relevance in directing an effective treatment strategy in patients with a medical history of CVD and/or high iron stores. / AFRIKAANSE OPSOMMING: Nie-Alkoholiese Vettige Lewer Siekte (NAFLD) is die mees algemene kroniese lewer siekte in Westerse lande en word bestempel as die hepatiese manifestasie van die Metaboliese Sindroom (MetS). Die heterogene natuur van NAFLD strek van hepatiese steatose deur steatohepatietis tot gevorderde fibrose en sirrose waar grootskaalse alkohol inname uitgesluit is. Die siekte-profiel van NAFLD en sy nekro-inflammatoriese subtipe Nie-Alkoholiese Steatohepatietis (NASH) is reeds beskryf in die ouer studie, wat ‗n klinies goed-gekarakteriseerde pasiënt groep vir die huidige ondersoek daar gestel het. Suid-Afrikaanse pasiënte met NASH het beduidend hoër gemiddelde serum cholesterol en trigliseried vlakke in vergelyking met slegs vettige lewer.
Die doel van hierdie studie was om ‗n hoë deurvoer rieëltyd polimerase kettingreaksie (RT-PCR) metode in ons laboratorium te implimenteer om kardiovaskulêre genetiese risiko faktore in NAFLD pasiënte te ondersoek. Die spesifieke mikpunte was om die kliniese nut en analitiese geldigheid van elke mutasie wat ingesluit is in die multi-geen kardiovaskulêre siekte (KVS) siftings toets vas te stel. Die Patologie Ondersteunde Genetiese Toetsing (PSGT) konsep wat by ons departement ontwikkel is, verskaf ‗n praktiese benadering tot persoonlike medisyne. Die KVS multi-geen toets analiseer belangrike metaboliese weë verwant aan atherogene dyslipidemie, kroniese inflammasie, oormatige bloedstolling en yster disregulering wat betrokke is by insulien weerstand wat bekend is as ‗n universele factor in the patogenese van NAFLD. Nadelige lae-penetrasie mutasies in die APOE (APOE2 en E4 allele), MTHFR (677C>T en 1298A>C) F2 (20210G>A), FV (1691G>A, Leiden) en HFE (C282Y en H63D) gene was ingesluit vir analise as gevolg van hul belangrike rol as genetiese bydraers tot die bogenoemde biologiese prosesse. ‗n Totaal van 178 pasiënte gediagnoseer met NAFLD en 75 kontroles is bestudeer deur gebruik te maak van direkte DNA volgordebepaling en ‗n RT-PCR metode vir mutasie opsporing. Twee pasiënte met verhoogde ferritien vlakke is ook as gevalle studies ingesluit.
‗n Beduidende assosiasie is gevind tussen HFE mutasies en verhoogde Alanien Transaminase (ALT) vlakke in die NAFLD studiepopulasie (p = 0.04) wat aanduidend is van ‗n subgroup van pasiënte wat die meeste baat sal vind uit genetiese toetsing om meer aggressiewe behandeling te rig op' n vroeër stadium. Die noodsaaklikheid van 'n geïntegreerde, stelsels-gebaseerde netwerk benadering is gewys om meer akkuraat te onderskei tussen Oorerflike Hemochromatose (HH) en Insulien Weerstand-geassosieerde Hepatiese Yster Oorlading (IR-HIO) sindroom in vetsugtige pasiënte. Die PSGT benadering tot persoonlike medisyne formuleer geen-gebaseerde intervensie programme aangepas tot die behoeftes van die pasiënt ek maak diagnose van KVS-subtipes en voorkoming van kumulatiewe risiko moontlik.
Hierdie bevindinge ondersteun die kliniese nut van die KVS multi-geen toets om riglyne vir die risikobestuur van kroniese siektes soos NAFLD daar te stel. Die HFE mutasie opsporings komponent van hierdie toets is van besondere belang om 'n effektiewe strategie vir die behandeling van pasiënte met 'n mediese geskiedenis van KVS en/of hoë yster vlakke daar te stel.
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The relationships among habitual physical activity, daily eating habits, aerobic fitness and cardiovascular risk factors in Hong Kongmales黃佩儀, Wong, Pui-yi. January 2001 (has links)
published_or_final_version / Sports Science / Master / Master of Science in Sports Science
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Physical activity and cardiovascular disease mortality, morbidity and all-cause mortality in Chinese elderly peopleWang, Xin, 王昕 January 2008 (has links)
published_or_final_version / Community Medicine / Master / Master of Philosophy
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The effect of parental hypertension on cardiovascular reactivity and anxiety amongst black youth.13 August 2012 (has links)
M.A. / Because of the high incidence of hypertension amongst South African blacks, many hypothesis have been forwarded to account for the relative higher index of hypertension amongst South African blacks when compared to whites. Because of the virtue lack of endemic proportions of hypertension in South African blacks at the beginning of this century, the often - quoted genetic hypothesis that hypertension is genetically determined would seem not to hold for South African situation. However, this was not yet tested as one of the risk factors or precursors to hypertension, namely the higher indices of cardiovascular reactivity had not been compared in the South African group between white and black subjects. This study investigated the hypothesis that the offspring of black hypertensive parents would show greater cardiovascular reactivity than those of black non-hypertensive parents, and also show greater cardiovascular reactivity than the children of white hypertensive parents as well as the children of white non-hypertensive parents. These hypotheses were partially supported. As expected the children of black hypertensives did show greater indices of cardiovascular reactivity when compared to both children of white hypertensives and the children of black non-hypertensives. An interesting finding however, was that the children of white hypertensives had shown greater indices of the psychological construct of state anxiety than the children of black hypertensive and black non-hypertensive subjects. Whereas this study supported the hypothesis that an inherited cardiovascular reactivity would and could account for the greater index of hypertension amongst South African blacks, it is also possible that the non-psychological expression of tension or cardiovascular reactivity in the form of state anxiety could partially account for the results herein obtained.
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Hispanics with Serious Mental Illness and At Risk for Cardiovascular Disease: Self-Management Behaviors and Barriers to Living a Healthy LifestyleGomes, Arminda January 2015 (has links)
Persons with serious mental illness (SMI) are in worse physical health compared to persons in the general population and are more likely to develop medical conditions, such as obesity and diabetes, which place them at risk for cardiovascular disease (CVD). There is some evidence that Hispanics with serious mental illness are at greater risk for developing CVD risk factors compared to non-Hispanic Whites with SMI mainly due to health disparities. This study asks the questions: 1) What self-management behaviors do Hispanics with SMI and at risk of CVD engage in or attempt to engage in?, 2) How do measures of self-efficacy and patient activation correspond to self-management behaviors and barriers?, and 3) How do patients’ and stakeholders’ reports of barriers converge or diverge? Self-efficacy theory and social ecology theory were used as theoretical frameworks. Twenty four consumers were recruited from an outpatient mental health clinic. Seventeen stakeholders were recruited through various sites. A convergent mixed methods approach was used. Quantitative measures of self-efficacy and patient activation were compared to qualitative data on self-management behaviors and barriers to healthy living. Additionally, two sets of qualitative data on consumers’ and stakeholders’ perceptions of barriers to healthy living were compared to determine if they converged. Self-management behaviors identified included: healthy eating, seeking medical care, engaging in physical activity, involving others, self-motivation, use of faith, and engaging in structured and unstructured activities. Consumers with high levels of self-efficacy and patient activation tended to engage in more self-management behaviors regularly and perceived fewer barriers. Consumers with the lowest levels of self- efficacy and patient activation engaged in fewer self-management behaviors regularly and encountered more barriers. Consumer and stakeholder perceptions of barriers to healthy living experienced by consumers did converge, with the exception of the following additional barriers which were only identified by stakeholders: lack of health education, lack of formal education, consumer beliefs and fears, and body image. Using an ecological approach, barriers were identified at different environmental levels, often interacting. Overall, self-efficacy and patient activation may have an important influence on self-management behaviors among Hispanics with SMI and at risk for CVD. There is the possibility that barriers may moderate this relationship. Additionally, an ecological approach to understanding barriers to healthy living can be used to locate barriers and develop interventions which address them.
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Work-related stress and cardiovascular risk factors in Chinese. / CUHK electronic theses & dissertations collection / Digital dissertation consortiumJanuary 2004 (has links)
Xu Liying. / "April 2004." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (p. 159-175) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
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Cardiovascular and chronic kidney disease in Chinese type 2 diabetic patients: from prognosis to management. / CUHK electronic theses & dissertations collectionJanuary 2008 (has links)
Conclusions. The growing epidemic of type 2 diabetes and its cardiorenal complications place a major burden on our health care system. Diabetic kidney disease is of particular importance in Asian populations including Chinese. In this series of studies, using a large prospective cohort established since 1995, I confirmed the powerful predictive value of albuminuria on cardio-renal complications. Inhibition of the RAAS interacted with both modifiable and genetic factors, notably the ACE I/D polymorphism, on the development of cardio-renal complications. In addition, it was found that CKD predicts CVD independent of albuminuria. Based on two prospective studies, I confirmed the effectiveness of global risk-factor control using structured care protocol to prevent these devastating complications. (Abstract shortened by UMI.) / I then examined the possible independent and interactive effects of CKD and albuminuria on cardio-renal outcomes in the original cohort of 5,004 patients. Glomerular filtration rate was estimated (eGFR) by the Modification of Diet in Renal Disease equation. The frequency of CKD as defined by eGFR <60ml/min/1.73m 2 was 15.8% in the cohort at baseline, when 6% of patients had serum creatinine ≥150mumol/L. / In collaboration with colleagues, I have conducted a series of studies to examine the prognostic factors for cardio-renal complications in Chinese type 2 diabetic patients. The modulating effects of RAAS inhibition and the effectiveness of rnuitidisciplinary care to prevent ESRD are also examined. / Research Hypotheses. (1) Albuminuria is a prognostic factor on cardio-renal outcomes in type 2 diabetes patients; (2) Chronic Kidney Disease is associated with other metabolic risk factors and phenotypes and is a prognostic factor on cardio-renal outcomes in type 2 diabetes patients; (3) Angiotensin-converting-enzyme insertion/deletion polymorphism is a prognostic factor on cardio-renal outcomes in type 2 diabetes patients, and has an effect on treatment responses with RAAS blockage with ACE inhibitors; (4) Structured care models by risk stratification using various prognostic factors and adherence to care protocol can improve cardio-renal outcome in type 2 diabetes patients. / Results. In a prospective cohort of 5,004 patients, I examined the effect of albuminuria and ACE inhibition on survival and cardio-renal outcomes in 3,773 patients who had been observed for at least 6 months with a mean follow up period of 35.8 months. / Taken together, measurement of serum creatinine alone without GFR estimation may underestimate the frequency of CKD in Chinese type 2 diabetic patients. Estimated GFR was inversely associated wit-29h an increasing frequency of micro- and macrovascular complications cross-sectionally and an increased risk of all-cause mortality prospectively, independent of albuminuria and metabolic control. / So Wing Yee. / Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3422. / Thesis (M.D.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 203-243). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / School code: 1307.
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An investigation on the determinants of the effectiveness of anti-hypertensive drugs for primary prevention of cardiovascular disease: a systemic review of randomized controlled trials. / 抗高血壓藥物預防心腦血管疾病效果的決定因素的研究: 隨機對照試驗的系統綜述 / CUHK electronic theses & dissertations collection / Kang gao xue ya yao wu yu fang xin nao xue guan ji bing xiao guo de jue ding yin su de yan jiu: sui ji dui zhao shi yan de xi tong zong shuJanuary 2007 (has links)
After adjusted for the effect of baseline MCE risk and reduction in SBP, the multivariate meta-regression showed baseline SBP was not significantly related to the RD for all the relevant outcomes examined (p>0.22) except MCE (p=0.0226). However, the baseline MCE risk remained significantly related to the RD for all the outcomes (p<0.01) except CHD (p=0.1011). The reduction in SBP remained significantly related to the RD for deaths due to CVD, MCE, CHF and stroke (p<0.01) but not to the RD for all-cause death (p=0.3788) and CHD (p=0.8755). / Conclusions. This study showed that baseline CVD risk and reduction in blood pressure were strongly and consistently related to the absolute effect of treatment and surprisingly the baseline blood pressure was not. The findings lend direct support to the overall risk approach to primary prevention and suggest that contrary to conventional wisdom and current practice, the overall CVD risk rather than blood pressure alone should be used to identify and treat people to prevent major CVD events through anti-hypertensive drugs. These findings suggest that anti-hypertensive drugs should be given to those who have a high future CVD risk rather than high blood pressure alone so as to achieve better cost-effectiveness of anti-hypertensive drugs for primary prevention. / Data extraction and analyses: Two reviewers independently abstracted data on baseline variables, variables that determine methodological quality, and outcomes. The following main outcomes were assessed: all-cause deaths, deaths due to cardiovascular disease, death due to causes other than CVD, major cardiovascular events (MCE), congestive heart failure (CHF), stroke, and coronary heart disease (CHD). / Key words. hypertension, antihypertensive drugs, cardiovascular disease, meta-analysis, systematic review, randomized controlled trial, primary prevention, baseline risk, evidence based medicine / Meta-analysis was used to obtain the overall odds ratio (OR) and risk difference (RD). Forest plots, bubble plots and funnel plots were used to show the results visually or to check biases. Meta-regression was used to identify factors that may independently determine the effect of antihypertensive drugs. The control CVD risk, initial mean blood pressure and reduction in blood pressure were examined. / Method. Identification of studies: The databases searched included ACP Journal Club, Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, Cumulative Index to Nursing & Allied Health Literature, Chinese Medical Current Contents to identify relevant studies between 1966 and 2005. We also examined references from relevant trials, reviews and meta-analyses. For trials to be included in this review, they have to have the following characteristics: (1) essential hypertension in patients of any age, sex and race; (2) treatment intervention is antihypertensive drugs; (3) control intervention is a placebo or no treatment; (4) endpoint outcomes are all-cause death and major cardiovascular events; and (5) randomized controlled trials. / Objective. Although the overall risk approach to cardiovascular disease (CVD) primary prevention has been widely adopted, direct evidence that supports this policy is however weak and in some aspects lacking. Importantly, there is no direct evidence to show, between blood pressure and CVD risk, which is a better predictor of the absolute benefit from anti-hypertensive drugs. The evidence that the absolute benefit increases as the future CVD risk increases does not necessarily mean that treating high risk people will be more cost-effective than treating hypertensive people as blood pressure may also be positively related to treatment benefit. The high risk approach would be preferable only when we can show with strong evidence that blood pressure is not related to the absolute benefit of treatment or the CVD risk is much more strongly related to the benefit than blood pressure. We thus conducted this systematic review to examine the evidence from randomized controlled trials to directly show how blood pressure and CVD risk are related to the absolute benefit from anti-hypertensive drugs and compare the capability of the two factors in predicting the benefit. The stronger predictor should be a better indicator for identifying those who should be treated with anti-hypertensive drugs. / Results. Twenty-two eligible randomized controlled trials with a total of 55,448 participants were identified from 1967 to 2004. The average follow-up was 45.6 months ranging from 13 to 84 months. The combined RD and OR for all-cause deaths, deaths due to CVD, MCE, CHF, Stroke and CHD were all statistically significant, showing a consistent and considerable reduction in the risk of these outcomes due to the treatment of anti-hypertensive drugs (p<0.01). / Jiang, Yu. / "September 2007." / Adviser: Jin Ling Tang. / Source: Dissertation Abstracts International, Volume: 69-08, Section: B, page: 4657. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (p. 107-115). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract in English and Chinese. / School code: 1307.
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