scholarly journals Relations of Arterial Stiffness With Postural Change in Mean Arterial Pressure in Middle-Aged Adults

Hypertension ◽  
2017 ◽  
Vol 69 (4) ◽  
pp. 685-690 ◽  
Author(s):  
Alyssa Torjesen ◽  
Leroy L. Cooper ◽  
Jian Rong ◽  
Martin G. Larson ◽  
Naomi M. Hamburg ◽  
...  
Keyword(s):  
Mean Arterial Pressure ◽  
Arterial Stiffness ◽  
Arterial Pressure ◽  
Postural Change ◽  
Middle Aged ◽  
Middle Aged Adults ◽  
Change In Mean

scholarly journals Associations of Retinal Microvascular Diameters and Tortuosity With Blood Pressure and Arterial Stiffness

Hypertension ◽  
2019 ◽  
Vol 74 (6) ◽  
pp. 1383-1390 ◽  
Author(s):  
Robyn J. Tapp ◽  
Christopher G. Owen ◽  
Sarah A. Barman ◽  
Roshan A. Welikala ◽  
Paul J. Foster ◽  
...  
Keyword(s):  
Blood Pressure ◽  
United Kingdom ◽  
Mean Arterial Pressure ◽  
Arterial Stiffness ◽  
Arterial Pressure ◽  
Retinal Vessel ◽  
Vessel Diameter ◽  
Automated Image Analysis ◽  
Stiffness Index ◽  
Arterial Stiffness Index

To examine the baseline associations of retinal vessel morphometry with blood pressure (BP) and arterial stiffness in United Kingdom Biobank. The United Kingdom Biobank included 68 550 participants aged 40 to 69 years who underwent nonmydriatic retinal imaging, BP, and arterial stiffness index assessment. A fully automated image analysis program (QUARTZ [Quantitative Analysis of Retinal Vessel Topology and Size]) provided measures of retinal vessel diameter and tortuosity. The associations between retinal vessel morphology and cardiovascular disease risk factors/outcomes were examined using multilevel linear regression to provide absolute differences in vessel diameter and percentage differences in tortuosity (allowing within person clustering), adjusted for age, sex, ethnicity, clinic, body mass index, smoking, and deprivation index. Greater arteriolar tortuosity was associated with higher systolic BP (relative increase, 1.2%; 95% CI, 0.9; 1.4% per 10 mmHg), higher mean arterial pressure, 1.3%; 0.9, 1.7% per 10 mmHg, and higher pulse pressure (PP, 1.8%; 1.4; 2.2% per 10 mmHg). Narrower arterioles were associated with higher systolic BP (−0.9 µm; −0.94, −0.87 µm per 10 mmHg), mean arterial pressure (−1.5 µm; −1.5, −1.5 µm per 10 mmHg), PP (−0.7 µm; −0.8, −0.7 µm per 10 mmHg), and arterial stiffness index (−0.12 µm; −0.14, −0.09 µm per ms/m 2 ). Associations were in the same direction but marginally weaker for venular tortuosity and diameter. This study assessing the retinal microvasculature at scale has shown clear associations between retinal vessel morphometry, BP, and arterial stiffness index. These observations further our understanding of the preclinical disease processes and interplay between microvascular and macrovascular disease.

Impact of mean arterial pressure on progression of arterial stiffness in peritoneal dialysis patients under strict volume control strategy

2012 ◽  
Vol 77 (02) ◽  
pp. 105-113 ◽  
Author(s):  
Mettem Sezis Demirci ◽  
Ozkan Gungor ◽  
Fatih Kircelli ◽  
Juan Jesus Carrero ◽  
Erhan Tatar ◽  
...  
Keyword(s):  
Peritoneal Dialysis ◽  
Mean Arterial Pressure ◽  
Arterial Stiffness ◽  
Arterial Pressure ◽  
Control Strategy ◽  
Volume Control ◽  
Dialysis Patients

scholarly journals Fourteen days of bed rest induces a decline in satellite cell content and robust atrophy of skeletal muscle fibers in middle-aged adults

2016 ◽  
Vol 120 (8) ◽  
pp. 965-975 ◽  
Author(s):  
Emily J. Arentson-Lantz ◽  
Kirk L. English ◽  
Douglas Paddon-Jones ◽  
Christopher S. Fry
Keyword(s):  
Skeletal Muscle ◽  
Satellite Cell ◽  
Bed Rest ◽  
Capillary Density ◽  
Peak Oxygen Consumption ◽  
Fiber Types ◽  
Middle Aged ◽  
Cell Content ◽  
Middle Aged Adults ◽  
Change In Mean

Bed rest, a ground-based spaceflight analog, induces robust atrophy of skeletal muscle, an effect that is exacerbated with increasing age. We examined the effect of 14 days of bed rest on skeletal muscle satellite cell content and fiber type atrophy in middle-aged adults, an understudied age demographic with few overt signs of muscle aging that is representative of astronauts who perform long-duration spaceflight. Muscle biopsies were obtained from the vastus lateralis of healthy middle-aged adults [ n = 7 (4 male, 3 female); age: 51 ± 1 yr] before (Pre-BR) and after (Post-BR) 14 days of bed rest. Immunohistochemical analyses were used to quantify myosin heavy chain (MyHC) isoform expression, cross-sectional area (CSA), satellite cell and myonuclear content, and capillary density. Peak oxygen consumption, knee extensor strength, and body composition were also measured Pre-BR and Post-BR. Post-BR MyHC type 2a fiber percentage was reduced, and mean CSA decreased in all fiber types (−24 ± 5%; P < 0.05). Satellite cell content was also reduced Post-BR (−39 ± 9%; P < 0.05), and the change in satellite cell content was significantly correlated with the change in mean fiber CSA ( r2 = 0.60; P < 0.05). A decline in capillary density was observed Post-BR (−23 ± 6%; P < 0.05), and Post-BR capillary content was significantly associated with Post-BR peak aerobic capacity ( r2 = 0.59; P < 0.05). A subtle decline in myonuclear content occurred during bed rest (−5 ± 1%; P < 0.05). The rapid maladaptation of skeletal muscle to 14 days of mechanical unloading in middle-aged adults emphasizes the need for robust countermeasures to preserve muscle function in astronauts.

scholarly journals The evolution of mean arterial pressure in critically ill patients on vasopressors before and during a trial comparing a specific mean arterial pressure target to usual care

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Marie-Hélène Masse ◽  
Neill K. J. Adhikari ◽  
Xavier Théroux ◽  
Marie-Claude Battista ◽  
Frédérick D’Aragon ◽  
...  
Keyword(s):  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Usual Care ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Intervention Group ◽  
Control Group ◽  
Chronic Hypertension ◽  
The Mean ◽  
Change In Mean

Abstract Background In randomized clinical controlled trials, the choice of usual care as the comparator may be associated with better clinician uptake of the study protocol and lead to more generalizable results. However, if care processes evolve to resemble the intervention during the course of a trial, differences between the intervention group and usual care control group may narrow. We evaluated the effect on mean arterial pressure of an unblinded trial comparing a lower mean arterial pressure target to reduce vasopressor exposure, vs. a clinician-selected mean arterial pressure target, in critically ill patients at least 65 years old. Methods For this multicenter observational study using data collected both prospectively and retrospectively, patients were recruited from five of the seven trial sites. We compared the mean arterial pressure of patients receiving vasopressors, who met or would have met trial eligibility criteria, from two periods: [1] at least 1 month before the trial started, and [2] during the trial period and randomized to usual care, or not enrolled in the trial. Results We included 200 patients treated before and 229 after trial initiation. There were no differences in age (mean 74.5 vs. 75.2 years; p = 0.28), baseline Acute Physiology and Chronic Health Evaluation II score (median 26 vs. 26; p = 0.47) or history of chronic hypertension (n = 126 [63.0%] vs. n = 153 [66.8%]; p = 0.41). Mean of the mean arterial pressure was similar between the two periods (72.5 vs. 72.4 mmHg; p = 0.76). Conclusions The initiation of a trial of a prescribed lower mean arterial pressure target, compared to a usual clinician-selected target, was not associated with a change in mean arterial pressure, reflecting stability in the net effect of usual clinician practices over time. Comparing prior and concurrent control groups may alleviate concerns regarding drift in usual practices over the course of a trial or permit quantification of any change.

scholarly journals Evaluation of the causal effects between dopamine infusion changeover and fluctuations in mean arterial pressure in neonates

2019 ◽  
Vol 105 (4) ◽  
pp. 390-394
Author(s):  
Katherine Kirupakaran ◽  
Paula de Sousa ◽  
Celine Le Roux ◽  
Lauren Redwood ◽  
Heike Rabe ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Neonatal Unit ◽  
Improvement Project ◽  
Dopamine Infusion ◽  
Dopamine Concentration ◽  
Arterial Blood ◽  
Significant Difference ◽  
Change In Mean

ObjectiveTo evaluate whether changing dopamine infusions every 12 hours and preparing these infusions 30 min before administration reduces blood pressure fluctuations in preterm and term neonates.DesignThis was a retrospective study using data from live patients on the neonatal unit and prospective study exploring stability of infusions in a laboratory-based neonatal ward simulation.SettingSingle-centre study in a tertiary neonatal surgical unit in a university teaching hospital.PatientsNeonates who received more than one subsequent dopamine infusion and had invasive arterial blood pressure monitoring, during their admission in the neonatal unit, were included.InterventionsAs part of the Quality Improvement project, the standard operating procedure (SOP) was changed, and dopamine infusions were prepared by nursing staff and left to rest for 30 min before administering to the neonate. Additionally, infusions were replaced every 12 hours.Main outcome measuresThe percentage change in mean arterial pressure (MAP) and the percentage loss in the drug concentration during infusion during changeover.ResultsOur findings indicate that up to 15% of the initial dopamine concentration is lost after 24 hours. This results in a sharp variation in the dopamine concentration during infusion changeover that correlates with observed rapid fluctuations in MAP. In changing the SOP, no significant difference in the concentration of dopamine and MAP were observed over 12 hours.ConclusionsDelaying administration of dopamine infusions by 30 min after preparation combined with changing infusions 12 hourly has reduced MAP fluctuations. Therefore, the risks associated with MAP fluctuations, including intraventricular haemorrhages, are reduced.

scholarly journals Influence of Body Composition on Arterial Stiffness in Middle-Aged Adults: Healthy UAL Cross-Sectional Study

Medicina ◽  
2019 ◽  
Vol 55 (7) ◽  
pp. 334 ◽  
Author(s):  
Alba Hernandez-Martinez ◽  
Elena Martinez-Rosales ◽  
Manuel Alcaraz-Ibañez ◽  
Alberto Soriano-Maldonado ◽  
Enrique G. Artero
Keyword(s):  
Body Composition ◽  
Arterial Stiffness ◽  
Metabolic Diseases ◽  
Cross Sectional Study ◽  
Neck Circumference ◽  
Fat Free Mass ◽  
Sectional Study ◽  
Middle Aged ◽  
Cross Sectional ◽  
Middle Aged Adults

Background and objectives: Several anthropometric and body composition parameters have been linked to arterial stiffness (AS) as a biomarker of cardiovascular disease. However, little is known about which of these closely related factors is more strongly associated with AS. The aim of the present study was to analyze the relationship of different anthropometric and body composition parameters with AS in middle-aged adults. Materials and Methods: This cross-sectional study included 186 middle-aged participants (85 women, 101 men; age = 42.8 ± 12.6 years) evaluated as part of the Healthy UAL study, a population study conducted at the University of Almería with the main purpose of analyzing the etiology and risk factors associated with cardio-metabolic diseases. Anthropometric measures included neck, waist, and hip circumferences, as well as the waist-to-height ratio (WHtr). Bioimpedance-derived parameters included fat-free mass index (FFMI), fat mass index (FMI), and percent of body fat (%BF). AS was measured by pulse wave velocity (PWV). The relationships of interest were examined through stepwise regression analyses in which age and sex were also introduced as potential confounders. Results: Neck circumference (in the anthropometric model; R 2: 0.889; β: age = 0.855, neck = 0.204) and FFMI (in the bio-impedance model; R2: 0.891; β: age = 0.906, FFMI = 0.199) emerged as significant cross-sectional predictors of AS. When all parameters were included together (both anthropometry and bio-impedance), both neck circumference and FFMI appeared again as being significantly associated with AS (R2: 0.894; β: age = 0.882, FFMI = 0.126, neck = 0.093). Conclusion: It was concluded that FFMI and neck circumference are correlated with AS regardless of potential confounders and other anthropometric and bioimpedance-derived parameters in middle-aged adults.

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