scholarly journals Differences in angiotensin (1–7) between men and women

2015 ◽  
Vol 308 (9) ◽  
pp. H1171-H1176 ◽  
Author(s):  
Jennifer C. Sullivan ◽  
Paula Rodriguez-Miguelez ◽  
Margaret A. Zimmerman ◽  
Ryan A. Harris
Keyword(s):  
Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Vascular Function ◽  
Plasma Concentrations ◽  
Ang Ii ◽  
Cross Sectional ◽  
Men And Women ◽  
Time To Peak ◽  
Artery Flow ◽  
Age Range

In experimental animal models of hypertension, angiotensin (1–7) [ANG-(1–7)] is higher in females compared with males; however, it is less clear whether the same applies to humans. Therefore, this study sought to compare circulating concentrations of ANG-(1–7) in apparently healthy men and women under normal physiological conditions. With the use of a cross-sectional experimental design, blood was collected in EDTA anticoagulant from 42 volunteers (21 men and 21 women; and age range, 19–48 yr) for analysis of plasma concentrations of ANG-(1–7) and ANG II. Blood pressure was measured and vascular endothelial function was determined ( n = 25) using the brachial artery flow-mediated dilation (FMD) test. As a result, women exhibited a higher circulating concentration of ANG-(1–7) ( P = 0.04) compared with men, whereas values of ANG II were similar between groups. Baseline arterial diameter, peak diameter, and shear rate were significantly greater ( P < 0.02) in men compared with women. No significant differences in FMD, FMD normalized for shear, or time to peak dilation were observed between men and women. In addition, a positive correlation between ANG-(1–7) and FMD ( P = 0.04) and negative association between ANG-(1–7) with ANG II ( P = 0.01) were only identified in men, whereas a positive relationship between ANG-(1–7) and diastolic blood pressure ( P = 0.03) was observed in women. In conclusion:, women exhibit significantly higher plasma concentrations of ANG-(1–7) compared with men. In addition, this study describes a relationship between ANG-(1–7), vascular function, and diastolic blood pressure that appears to be sex dependent.

Abstract 057: Nox5 Induces Vascular Dysfunction and Arterial Remodelling Independently of Blood Pressure Elevation in Ang II-infused Nox5-expressing Mice

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Augusto C Montezano ◽  
Adam P Harvey ◽  
Francisco J Rios ◽  
Maria Dulak-Lis ◽  
Wendy Beatie ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Vascular Function ◽  
Kinase Inhibitor ◽  
Vascular Dysfunction ◽  
Rho Kinase ◽  
Lumen Diameter ◽  
Ang Ii ◽  
Cross Sectional ◽  
Blood Pressure Elevation ◽  
Endothelium Dependent Relaxation

Nox5 is a unique Ca 2+ -sensitive Nox isoform that is expressed in human vascular smooth muscle cells (VSMC). Although Nox5 has been implicated in diabetic nephropathy, its role in vascular function and development of hypertension remain unclear. Nox5 is not expressed in rodents, and accordingly we generated humanised Nox5 mice with Nox5 expressed in a VSMC-specific manner (Nox5SM22). Control (wild-type) and Nox5SM22 mice were infused with Ang II (600 ng/Kg/day). Blood pressure (BP) was assessed by tail-cuff. Vascular function and structure of resistance arteries were measured by myography. Ang II increased BP in WT (182.5±10 mmHg) and Nox5SM22 mice (173.1±5 mmHg) with no significant differences. Arteries from Nox5SM22 mice exhibited reduced endothelium-dependent relaxation versus WT controls (%ACh relaxation: 55.1±4 vs ctl: 81.6±7%). Fasudil (Rho kinase inhibitor)-induced relaxation was reduced in Nox5SM22 mice versus controls (%Fas: 111.3±11 vs ctl: 166.6±8%) (p<0.05). Ang II increased the maximal contraction to U46619 (thromboxane A2 mimetic) in WT (115.8±2 vs untreated: 101.4±2%) and Nox5SM22 (121.3±3 vs untreated: 99.1±2) (p<0.05) and induced endothelial dysfunction in all groups. Fasudil-induced relaxation was impaired by Ang II in WT (102.7±6 vs untreated: 166.6±8%, p<0.05) but not further impaired in Nox5SM22 mice (114.9±6 vs untreated: 111.3±11%). Ang II increased cross-sectional area (CSA) and lumen diameter; while in Nox5SM22 mice, Ang II increased wall thickness, wall-to-lumen ratio, CSA and decreased lumen diameter, with associated increased vascular stiffness. Our findings indicate that in mice expressing human Nox5 in VSMCs, endothelium-dependent relaxation is impaired, fasudil-mediated vasodilation is attenuated and vessels undergo exaggerated hypertrophic inward remodelling with increased stiffness; processes that occur independently of BP elevation. These data suggest an important role for Nox5 in Ang II-induced vascular dysfunction and remodeling, but not in the development of hypertension. Moreover, we identify Rho kinase as a putative target for Nox5-induced vascular injury. We provide novel insights into Nox5 vascular biology and demonstrate that vascular Nox5 actions are dissociated from BP effects.

scholarly journals Association between Blood Pressure and Serum Thyroid-Stimulating Hormone Concentration within the Reference Range: A Population-Based Study

2007 ◽  
Vol 92 (3) ◽  
pp. 841-845 ◽  
Author(s):  
Bjørn O. Åsvold ◽  
Trine Bjøro ◽  
Tom I. L. Nilsen ◽  
Lars J. Vatten
Keyword(s):  
Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Outcome Measures ◽  
Odds Ratio ◽  
Reference Range ◽  
Positive Association ◽  
Population Based ◽  
Thyroid Stimulating Hormone ◽  
Cross Sectional ◽  
Population Based Study

Abstract Context: The association between thyroid function and blood pressure is insufficiently studied. Objective: The objective of the investigation was to study the association between TSH within the reference range and blood pressure. Design and Setting: This was a cross-sectional, population-based study. Subjects: A total of 30,728 individuals without previously known thyroid disease were studied. Main Outcome Measures: The main outcome measures were mean systolic and diastolic blood pressure and pulse pressure and odds ratio for hypertension (&gt;140/90 mm Hg or current or previous use of antihypertensive medication), according to categories of TSH. Results: Within the reference range of TSH (0.50–3.5 mU/liter), there was a linear increase in blood pressure with increasing TSH. The average increase in systolic blood pressure was 2.0 mm Hg [95% confidence interval (CI) 1.4–2.6 mm Hg] per milliunit per liter increase in TSH among men, and 1.8 mm Hg (95% CI 1.4–2.3 mm Hg) in women. The corresponding increase in diastolic blood pressure was 1.6 mm Hg (95% CI 1.2–2.0 mm Hg) in men and 1.1 mm Hg (95% CI 0.8–1.3 mm Hg) in women. Comparing TSH of 3.0–3.5 mU/liter (upper part of the reference) with TSH of 0.50–0.99 mU/liter (lower part of the reference), the odds ratio for hypertension was 1.98 (95% CI 1.56–2.53) in men and 1.23 (95% CI 1.04–1.46) in women. Conclusion: Within the reference range of TSH, we found a linear positive association between TSH and systolic and diastolic blood pressure that may have long-term implications for cardiovascular health.

Cardiovascular Responses to Muscle Stretching: A Systematic Review and Meta-analysis

2021 ◽  
Author(s):  
Ewan Thomas ◽  
Marianna Bellafiore ◽  
Ambra Gentile ◽  
Antonio Paoli ◽  
Antonio Palma ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cardiovascular System ◽  
Vascular Function ◽  
Meta Analysis ◽  
Random Effect ◽  
Cardiovascular Responses ◽  
Qualitative Description ◽  
Cross Sectional ◽  
Quantitative Synthesis

AbstractThe aim of this study will be to review the current body of literature to understand the effects of stretching on the responses of the cardiovascular system. A literature search was performed using the following databases: Scopus, NLM Pubmed and ScienceDirect. Studies regarding the effects of stretching on responses of the cardiovascular system were investigated. Outcomes regarded heart rate(HR), blood pressure, pulse wave velocity (PWV of which baPWV for brachial-ankle and cfPWV for carotid-femoral waveforms), heart rate variability and endothelial vascular function. Subsequently, the effects of each outcome were quantitatively synthetized using meta-analytic synthesis with random-effect models. A total of 16 studies were considered eligible and included in the quantitative synthesis. Groups were also stratified according to cross-sectional or longitudinal stretching interventions. Quality assessment through the NHLBI tools observed a “fair-to-good” quality of the studies. The meta-analytic synthesis showed a significant effect of d=0.38 concerning HR, d=2.04 regarding baPWV and d=0.46 for cfPWV. Stretching significantly reduces arterial stiffness and HR. The qualitative description of the studies was also supported by the meta-analytic synthesis. No adverse effects were reported, after stretching, in patients affected by cardiovascular disease on blood pressure. There is a lack of studies regarding vascular adaptations to stretching.

scholarly journals Biomarker-estimated flavan-3-ol intake is associated with lower blood pressure in cross-sectional analysis in EPIC Norfolk

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Javier I. Ottaviani ◽  
Abigail Britten ◽  
Debora Lucarelli ◽  
Robert Luben ◽  
Angela A. Mulligan ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Systolic Blood Pressure ◽  
Vascular Function ◽  
Cardiovascular Health ◽  
Vascular Diseases ◽  
Inverse Association ◽  
Cvd Risk ◽  
Lower Systolic Blood Pressure ◽  
Cross Sectional ◽  
Salt Reduction

Abstract Flavan-3-ols are a group of bioactive compounds that have been shown to improve vascular function in intervention studies. They are therefore of great interest for the development of dietary recommendation for the prevention of cardio-vascular diseases. However, there are currently no reliable data from observational studies, as the high variability in the flavan-3-ol content of food makes it difficult to estimate actual intake without nutritional biomarkers. In this study, we investigated cross-sectional associations between biomarker-estimated flavan-3-ol intake and blood pressure and other CVD risk markers, as well as longitudinal associations with CVD risk in 25,618 participants of the European Prospective Investigation into Cancer (EPIC) Norfolk cohort. High flavan-3-ol intake, achievable as part of an habitual diet, was associated with a significantly lower systolic blood pressure (− 1.9 (− 2.7; − 1.1) mmHg in men and − 2.5 (− 3.3; − 1.8) mmHg in women; lowest vs highest decile of biomarker), comparable to adherence to a Mediterranean Diet or moderate salt reduction. Subgroup analyses showed that hypertensive participants had stronger inverse association between flavan-3-ol biomarker and systolic blood pressure when compared to normotensive participants. Flavanol intake could therefore have a role in the maintenance of cardiovascular health on a population scale.

scholarly journals Association between egg intake and blood pressure in the USA: the INTERnational study on MAcro/micronutrients and blood Pressure (INTERMAP)

2021 ◽  
pp. 1-9
Author(s):  
Thanh-Huyen T Vu ◽  
Linda Van Horn ◽  
Martha L Daviglus ◽  
Queenie Chan ◽  
Alan R Dyer ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Dietary Cholesterol ◽  
International Study ◽  
Obese Women ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Men And Women ◽  
The Usa ◽  
Underlying Mechanisms

Abstract Objectives: To investigate associations of egg intake with blood pressure (BP) and the role of dietary variables and other macro- and micro-nutrients in the association. Design: We used cross-sectional data for the USA as part of the INTERnational study on MAcro/micronutrients and blood Pressure (INTERMAP). INTERMAP was surveyed between 1996 and 1999, including four 24-h dietary recalls, two 24-h urine collections and eight measurements of systolic BP and diastolic BP (SBP, DBP). Average egg intake (g/d) was calculated. Multivariable linear regression models were used to estimate the association between egg intake (per each 50 g/d or per quintile) and BP. The roles of dietary variables and other macro- and micro-nutrients in this association were also investigated. Setting: In the USA. Participants: In total, 2195 US INTERMAP men and women aged 40–59 years. Results: Participants were 50 % female, 54 % non-Hispanic White and 16 % non-Hispanic Black. Mean egg intake (sd) in men and women was 30·4(29·8) and 21·6(20·5) g/d, respectively. Adjusting for demographics, socio-economics, lifestyle and urinary Na:K excretion ratios, we found non-linear associations with BP in non-obese women (P-quadratic terms: 0·004 for SBP and 0·035 for DBP).The associations remained after adjusting for dietary variables, macro/micro nutrients or minerals. Dietary cholesterol was highly correlated with egg intake and may factor in the association. No association was found in obese women and in obese or non-obese men. Conclusion: Egg intake was non-linearly associated with SBP and DBP in non-obese women, but not in obese women or men. Underlying mechanisms require additional study regarding the role of obesity and sex.

scholarly journals Heart rate variability and blood pressure among Japanese men and women: a community-based cross-sectional study

2014 ◽  
Vol 37 (8) ◽  
pp. 779-784 ◽  
Author(s):  
Hiromi Mori ◽  
Isao Saito ◽  
Eri Eguchi ◽  
Koutatsu Maruyama ◽  
Tadahiro Kato ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Community Based ◽  
Cross Sectional ◽  
Japanese Men ◽  
Men And Women

What Physical Fitness Component Is Most Closely Associated With Adolescents' Blood Pressure?

2017 ◽  
Vol 124 (6) ◽  
pp. 1107-1120 ◽  
Author(s):  
Heloyse E. G. Nunes ◽  
Carlos A. S. Alves ◽  
Eliane C. A. Gonçalves ◽  
Diego A. S. Silva
Keyword(s):  
Blood Pressure ◽  
Body Composition ◽  
Muscle Strength ◽  
Physical Fitness ◽  
Systolic Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Aerobic Fitness ◽  
Pressure Control ◽  
Cross Sectional ◽  
Digital Pressure

This study aimed to determine which of four selected physical fitness variables, would be most associated with blood pressure changes (systolic and diastolic) in a large sample of adolescents. This was a descriptive and cross-sectional, epidemiological study of 1,117 adolescents aged 14–19 years from southern Brazil. Systolic and diastolic blood pressure were measured by a digital pressure device, and the selected physical fitness variables were body composition (body mass index), flexibility (sit-and-reach test), muscle strength/resistance (manual dynamometer), and aerobic fitness (Modified Canadian Aerobic Fitness Test). Simple and multiple linear regression analyses revealed that aerobic fitness and muscle strength/resistance best explained variations in systolic blood pressure for boys (17.3% and 7.4% of variance) and girls (7.4% of variance). Aerobic fitness, body composition, and muscle strength/resistance are all important indicators of blood pressure control, but aerobic fitness was a stronger predictor of systolic blood pressure in boys and of diastolic blood pressure in both sexes.

Abstract P355: Predicting the 20-year Risk of First Coronary or Ischemic Stroke Event in Northern Italy: The CAMUNI Absolute Risk Equation

Circulation ◽  
2013 ◽  
Vol 127 (suppl_12) ◽  
Author(s):  
Giovanni Veronesi ◽  
Lloyd E Chambless ◽  
Francesco Gianfagna ◽  
Giuseppe Mancia ◽  
Giancarlo Cesana ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Family History ◽  
Diastolic Blood Pressure ◽  
Cardiovascular Events ◽  
Absolute Risk ◽  
Northern Italy ◽  
Men And Women ◽  
Basic Model ◽  
History Of

Aims. Recent US guidelines advocate the introduction of lifetime or long-term absolute risk prediction for primary prevention of cardiovascular events, especially for young people and women. Therefore, long-term prediction models might be specially beneficial in population considered at low incidence. We aim to develop a 20-year absolute risk prediction equation in a Northern Italy population. Methods. Four independent population-based cohorts were enrolled between 1986 and 1994 from the Brianza population (Northern Italy), adopting standardized MONICA procedures. The study sample comprises n=2574 men and 2673 women, aged 35 to 69 years and free of CVD at baseline. Participants were followed-up for incidence of first coronary and ischemic stroke events (fatal and non-fatal; all MONICA validated) for a median time of 15 years (IQ range: 12-20) and up to the end of 2008. We compared several gender-specific Cox Proportional Hazards models: the basic one includes age, total cholesterol, HDL-cholesterol, systolic blood pressure, anti-hypertensive treatment, cigarette smoking and diabetes. Candidates to model addition were diastolic blood pressure, triglycerides, BMI, family history of CHD, and education. Model calibration was tested using the Grønnesby-Bogan goodness-of-fit statistic. The Area Under the ROC-Curve (AUC) was a measure of discrimination, corrected for over-optimism via bootstrapping. Changes in discrimination (Δ-AUC) and reclassification (Net Reclassification Improvement, NRI) defined the improvement from the basic model due to an additional risk factor. Intermediate risk was defined as 20-year risk between 10% and 40%. Results. We observed n=286 events in men (incidence rate 7.7 per 1000 person-years) and n=108 in women (2.6 per 1000 person-years). All risk factors included in the basic model were predictive of first cardiovascular event in both genders; discrimination was 0.725 and 0.802 in men and women, respectively. Average specificity in the top risk quintile (cut-off value: 23% in men and 8.5% in women) was similar in men and women (85% vs. 83%), while sensitivity was higher in women (63% vs. 46%). All the models were well-calibrated (p-values >0.05). The addition of a positive family history of CHD in men (Hazard Ratio: 1.6; 95%CI 1.2-2.1) and of diastolic blood pressure in women (HR: 1.4 for 11 mmHg increase; 1.1-1.8) significantly improved discrimination (Δ-AUC=0.01; 95%CI 0.002-0.02 [men] and Δ-AUC=0.005; 95%CI 0.0001-0.01 [women]) and reclassification of subjects at intermediate risk (NRI=8.4%;1.7%-19.1% [men]; and NRI=11.7%; -3.2%-33.5% [women]). Conclusions. Traditional risk factors are predictive of cardiovascular events after 20 years, with good discrimination. The addition of family history of CHD may contribute to model improvement, at least among men; the role of diastolic blood pressure in women should be carefully evaluated.

scholarly journals Waist Circumference, Blood Pressure and Lifestyle of Sudanese Population, Khartoum Locality, Sudan 2016

2019 ◽  
pp. 1-8
Author(s):  
Asma Abdelaal Abdalla ◽  
Siham Ahmed Balla ◽  
Amna Abdalla Babiker ◽  
Safaa Abdelhameed Medani ◽  
Rania Abdalla Osman Khalfa ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Waist Circumference ◽  
Physical Exercise ◽  
Age Distribution ◽  
Cross Sectional Study ◽  
P Value ◽  
Cross Sectional ◽  
Men And Women ◽  
Study Population ◽  
The Mean

Aims: To measure the waist circumference of Sudanese adults in Khartoum Locality and its relationship to blood pressure and lifestyle  during celebration of international day of hypertension in May 2016 . Study Design: It was a descriptive cross-sectional study. Place of the Celebration: Khartoum Locality at Alsahaa Alkhadraa (The Green Park). Methodology: A total of 364 adult participants, 196 men and 168 women were interviewed using structured questionnaire. Blood pressure (BP) was measured considering hypertension as ≥ 140 mmHg and ≥ 90 mmHg for systole and diastole BP respectively. Waist circumference was measured using an anthropometric measuring tape at cut-off point of 94 cm and 80 cm for men and women respectively. Data was managed by SPSS version 20 and Chi-square test at 95% CL was used to test the association between waist circumference, blood pressure and life style characteristics. Results: Age distribution of the study population showed 48.2% females and 45.4% males in the middle age group (38-57 years). Two thirds of the study population were hypertensive, 62.8% of males and 64.3% of females. The mean waist circumference of men was 97.82 cm + 16.7, mean Systolic BP was 127 + 22 and mean Diastolic BP was 85 + 15. The mean waist circumference of women was 99.31 + 16.2, mean Systolic was 128 + 24 and mean Diastolic BP was 84 +17. Abnormal waist circumference was found in 61.2% of males and 86.9% of females. Fifty nine (30.1%) of the males and 86 (51.2%) of the females with abnormal waist circumference were hypertensive. The association between abnormal waist circumference and high blood pressure was significant among both sexes, P value = 0.001. Physical exercise and fat and salt foods were not significantly associated waist circumference in both men and women. Conclusion: Two thirds of women and men in the celebrating areas were hypertensive.  Half of women and one third of men were significantly hypertensive and having abnormal waist circumference. Doing physical exercise, avoiding fat and salt foods was insignificantly associated with normal waist circumference. Large survey with representative sample is needed to estimate the real Sudanese waist circumference.  

scholarly journals Evaluation of blood pressure in school children aged 12-16 years

2017 ◽  
Vol 4 (4) ◽  
pp. 1218
Author(s):  
Balakrishnan Nadesan ◽  
Mani Madhavan Sachithananthamoorthi ◽  
Sivaraman Thirumalaikumarasamy ◽  
Ezhilarasu Ramalingam
Keyword(s):  
Blood Pressure ◽  
Family History ◽  
Diastolic Blood Pressure ◽  
School Children ◽  
Diastolic Pressure ◽  
Systolic Pressure ◽  
Cross Sectional ◽  
Significant Difference ◽  
History Of ◽  
Family History Of Hypertension

Background: Hypertension is considered as a major health issue in developed as well as developing countries and its possible origin during childhood prompts pediatricians to routinely include measurement of blood pressure (BP) as an integral part of pediatric physical examination. The objectives of the study were to evaluate the normal range of blood pressure in adolescent school going students of 12-16 years, prevalence of hypertension and relationship of BP with variables like age, body mass index (BMI), socioeconomic status and family history of hypertension.Methods: A cross sectional study was undertaken for a period of one year in adolescent school children in age groups between 12-16 years. Detailed clinical examination was done in 1060 adolescent school children and BP was recorded in right upper limb and correlation of BP with BMI, family history of hypertension and diabetes were studied.Results: Mean systolic and diastolic pressure showed linear relationship with age. There was a highly statistically significant difference between mean systolic and diastolic blood pressure between lower and middle socio-economic class. Prevalence of obesity in our study was 1.13%, overweight was 7.83%. Prevalence of hypertension in obese children was 33.33% and in overweight children 18.07%. Family history of hypertension and diabetes carry a significant correlation with elevated systolic and diastolic blood pressure in adolescents.Conclusions: This study revealed that socio economic factors play a significant role in determining the blood pressure of the individual. Children of middle class have significantly elevated mean systolic pressure and mean diastolic pressure than low socio-economic groups. 

Sign in / Sign up

Export Citation Format

Share Document