View clinical trials related to Hypertension.
Filter by:The aim of the study is to observe the change of the circulating MrgD level in patients with pulmonary hypertension compared with subjects without pulmonary hypertension.
A randomized trial of remote blood pressure monitoring, compared to usual care, in patients receiving bevacizumab to determine whether remote blood pressure monitoring improves the collection of blood pressure data, identification and management of clinically significant hypertension, and patient satisfaction.
In chronic kidney disease (CKD), hypertension is characterized by the phenomenon of sodium-sensitivity, i.e., the disproportionate increase in blood pressure (BP) due to an increase in dietary sodium consumption to maintain homeostasis through urinary sodium excretion. Impaired renal circulation, blunt suppression of renin-angiotensin-aldosterone system, sympathetic nervous system overactivity, paradoxically reduced levels of atrial natriuretic peptide and hyperinsulinemia represent the main pathophysiologic mechanisms. Accumulated evidence has suggested that uromodulin plays a central role in the development of sodium-sensitive hypertension. Uromodulin is a kidney-specific glycoprotein which is exclusively produced by the epithelial cells lining the thick ascending limb and early distal convoluted tubule. It is currently recognized as a multifaceted player in kidney physiology and disease, with discrete roles for intracellular, urinary, interstitial and serum uromodulin. Among these, urinary uromodulin modulates renal sodium handling through regulating tubular transporters that reabsorb sodium and are targeted by diuretics, i.e., the loop diuretic-sensitive Na+-K+-2Cl- cotransporter type 2 (NKCC2) and the thiazide-sensitive Na+/Cl- cotransporter (NCC). Given these roles, the contribution of uromodulin to sodium-sensitive hypertension has been proposed. In preclinical models, uromodulin deficiency causes decreased BP that is resistant to dietary salt, while uromodulin overexpression causes hypertension due to increased tubular sodium reabsorption that is responsive to furosemide. Genetic human studies have identified robust associations of specific UMOD gene variants with sodium sensitivity and incident hypertension risk, while comprehensive Mendelian randomization studies have affirmed these associations by highlighting the causal relationship between UMOD variants, urinary uromodulin levels and hypertension. Furthermore, clinical studies in both healthy individuals and hypertensive patients have indicated a link between sodium sensitivity and uromodulin, directly affecting mean BP levels and BP response to salt intake. With regards to CKD population, solid data on the link of uromodulin with sodium sensitivity are currently missing from the literature. There is only a pediatric study in the setting of CKD (stages 2-3), which failed to show an association between urinary uromodulin levels indexed to urinary creatinine (UMOD/uCr) and either 24-hour or office BP; however, this study has several limitations, and its results should be interpreted with caution. To best of our knowledge, there is no study up to date investigating the effect of dietary sodium intake on 24-hour ambulatory blood pressure depending on urinary uromodulin levels in adult CKD patients.
Emerging data connect diet, the gut microbiota and its metabolites in cardiometabolic disease. Hypertensive disorders of pregnancy (HDP) are common and are a leading cause of maternal and neonatal morbidity. HDP likely share similar pathophysiology as cardiometabolic disease in non-pregnant people with a yet unrevealed role of diet and the gut microbiota, including systemic inflammation and endothelial dysfunction. Despite high biological plausibility that nutrition, the gut microbiota and its metabolites may play a role in health and disease in pregnancy, there is a paucity of data regarding these associations, thus limiting advancement of the field. Similar to the proposed pathogenesis for diet, gut microbiota and the microbial metabolite trimethylamine-N-oxide (TMAO) in cardiovascular disease, we hypothesize that the interplay between maternal diet, the gut microbiota and its associated microbial metabolites play a mechanistic role in HDP. We propose to test this hypothesis in a racially-diverse US cohort to determine association with adverse pregnancy outcomes, specifically future development of HDP. We propose to prospectively collect plasma and urine TMAO throughout pregnancy from a cohort of 200 pregnant participants. Through 1) characterizing plasma and urine TMAO levels across each trimester of pregnancy, and 2) assessment of this microbial metabolite as a predictor of development of HDP, we have the potential to identify a biomarker that would allow us to identify people at risk of HDP early in pregnancy and provide new opportunities for therapeutic interventions to improve maternal and neonatal outcomes.
National Health Service (NHS) England has commissioned The Royal Marsden Hospital NHS Foundation Trust to run a novel mobile clinical outreach service called 'Man Van' with the aim of enabling male patients' easy access to care at the site of their work and in their communities. The initial focus of this new standard of care clinic is to access workplaces with large manual workforces where large scale working from home is not possible. These will include logistics firms and bus companies. These companies employ large numbers of black and minority ethnic men who also have poorer outcomes with a range of other diseases, including Coronavirus disease (COVID)-19. The novel clinical service will collaborate with Unite (and other unions) as well as employers in order to reach our target groups effectively. There is also the opportunity to target higher risk groups e.g. Afro Caribbean communities whose rates of prostate cancer are 1 in 41 as well as occupational higher risk categories. The Man Van has the potential to swing the balance of evidence in favour of Prostate-Specific Antigen (PSA) screening, with a targeted screening program directed at high-risk groups including ethnic minorities and manual workers. Reasons for poorer outcomes amongst these groups are multi-factorial and complex. Levels of education are often a factor which can impact the understanding of the disease and how to seek assistance. Distrust of medical organisations has also been cited as a factor. The aim of the Man Van mobile outreach service is to enable men access to a specific men's health service - focusing on general health and wellbeing (including BMI assessment, blood pressure, blood sugar/diabetes checks etc) and a prostate check for those who raise concerns. This will include a PSA test where relevant. This will be the core data gathered from the project. Patients will receive PSA results in the 'Man Van' by a clinical nurse specialist with patients with raised PSA levels being referred into the standard rapid referral cancer pathways. Similar considerations will apply to men with haematuria detected on dip stick testing or who present with a testicular mass or penile lesion (both rare but important). The clinical data generated from each routine health screening appointment will be analysed to determine the effectiveness of the Man Van mobile outreach model in identifying prostate and other male cancers and other co-morbidities much earlier than if patients had waited to present to their General Practitioner (GP) or other healthcare provider. Patients who receive an early diagnosis of clinically significant prostate cancer will have access to early curative treatments, which are typically less invasive and shorter in timescales. Similar interventions have shown large scale success in particular with breast and cervical cancer. The NHS sees many patients accessing cancer care at a late stage. Reducing this trend is a key objective of the NHS Long Term Plan. The COVID-19 pandemic has further exacerbated health inequalities and mobile clinics can potentially be a model for alleviating this. To enable patients access to medical treatment earlier there is a need to make the 'seeking advice on men's health and prostate issues' less daunting, more normal and easily accessible. The 'Man Van' has the ability to do just that and it is anticipated that the findings of this research, using the data generated from each patient's routine health screening, will demonstrate that a mobile outreach model is more effective in identifying cancers at an earlier stage than 'traditional' diagnostic pathways. We also hope to evaluate the Man Van with a qualitative study looking at the patient perspectives from those who utilise the Man Van. The reasons for high risk in prostate cancer are heavily linked to genetics. This is an issue as there is less recruitment of high risk groups to studies. We hope to gather genetic data from a higher proportion of genetically susceptible men via the Man Van, which can be used in future to further genetic knowledge of prostate cancer.
The goal of this clinical trial is to test the efficacy of tadalafil in patients with group II pulmonary hypertension with elevated pulmonary vascular resistance (PVR). The main question it aims to answer is: • Can tadalafil improve patients with group II pulmonary hypertension with elevated PVR? Participants will undergo right heart catheterization (RHC) to make sure they are fulfilling the inclusion criteria, then will be asked to take tadalafil 20 mg for two weeks then 40 mg if tolerated for 12 weeks, then participants will be followed up. Investigators will compare the drug group with another age- and sex- matched control placebo group.
This study is designed to test the feasibility and acceptability of a new method for supporting physical activity among women ages 40-65 who have risk factors for cardiovascular disease. Each participant receives a trained physical activity coach and a physical activity partner; the partner is another woman in the program. Partners communicate with each other between weekly coaching sessions to provide support for physical activity behavior change.
This study was planned to investigate the effectiveness of combined exercise training, that is, functional inspiratory muscle training, with breathing exercises to be applied with a portable, easy-to-use respiratory muscle strengthening device, on exercise capacity and peripheral muscle strength.
To develop strategies to identify postpartum women at risk for adverse cardiovascular outcomes and provide them with preventative therapies.
Hypertension is the most important cause of cardiovascular disease (CVD), stroke, and premature death (WHO, 2021). It is estimated by The World Health Organisation in 2021 that 1.4 billion individuals across the globe have high blood pressure, with only 14% of people actively managing these elevated levels. Simple and effective lifestyle strategies are required to help people improve their blood pressure and/or attenuate increases in blood pressure with ageing. Physical activity is one possible strategy: in previous research, several different types of physical activity have been shown to have beneficial effects on blood pressure (Blackwell et al., 2017). However, many individuals do not adhere to currently recommended levels of physical activity (150 mins of moderate intensity physical activity per week), due to a combination of the required time commitment, lack of motivation, and the associated levels of effort, exertion, and physical discomfort (Korkiakangas et al 2009). Thus, there is a need to identify alternative exercise interventions which will overcome these barriers but remain effective at improving blood pressure (Herrod, Lund, & Phillips, 2021, Toohey et al, 2018). Low intensity isometric hand grip exercise training (IET) has been shown to result in large decreases in resting blood pressure in younger and older age groups, in both men and women, and in individuals with normal as well as elevated baseline blood pressure (Badrov et al, 2013; Bentley et al., 2018; Millar et al., 2014). In this research, IET has almost universally involved performing 4 x 2 IET holds at 30% of maximal voluntary contraction, 3 times a week, over a 4-8-week intervention (Millar et al, 2014). There are very few studies that have investigated the effect of changing different protocol parameters on changes in blood pressure and vascular health, and the minimal effective dose of IET is unknown. Defining the minimal effective dose of different types of exercise may help overcome key barriers to exercise by lowering the required time commitment, reducing perceived effort/exertion, and promoting more positive affective responses. One important modifiable parameter is training frequency and it is unknown whether reducing the frequency of IET will reduce the efficacy for improving blood pressure. Therefore, the primary objective of this study is to determine if reducing the frequency of isometric handgrip training from four times a week to two times a week will affect the improvements in resting blood pressure and vascular health in people with hypertension. A secondary objective is to investigate the acute affective and perceptual responses to sessions of IET and the effect of training on these acute affective/perceptual responses.