Abstract:
:Microvascular alterations associated with reversal of hypertension by exposure to simulated high altitude were investigated in the gracilis muscle of the spontaneously hypertensive rat (SHR). Male, 4-week-old SHR were either placed in a hypobaric chamber (SHR-HA) at 430 mmHg or maintained at ambient barometric pressure (SHR-SL) for 8-10 or 12-14 weeks. Measurements of microvascular diameter and density were made by closed-circuit television microscopy. Mean arterial blood pressure was significantly lower in the SHR-HA groups. Functional arteriolar rarefaction occurred in SHR-SL at 8-10 weeks while structural arteriolar rarefaction occurred after 12-14 weeks. In contrast, neither functional nor structural rarefaction of arterioles was observed in the SHR-HA groups. Although functional rarefaction of capillaries did occur in SHR-HA, it was less than that in SHR-SL. Total capillary density, however, was similar in SHR-SL and SHR-HA after 12-14 weeks. Vasoconstriction was decreased in SHR-HA and vasodilated arteriolar diameters were greater than those of SHR-SL. These results show that simulated high altitude lowered blood pressure in SHR and resulted in a microcirculatory bed resembling that seen in a normotensive animal.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Prewitt RL,Cardoso SS,Wood WBdoi
10.1097/00004872-198612000-00008subject
Has Abstractpub_date
1986-12-01 00:00:00pages
735-40issue
6eissn
0263-6352issn
1473-5598journal_volume
4pub_type
杂志文章abstract::The response of blood pressure, heart rate and plasma catecholamines to a mental arithmetic and a cold pressor test was studied in 70 patients with mild essential hypertension and in 41 age- and sex-matched normotensives. Each group consisted of three prospectively stratified age classes: 20-29, 30-39 and 40-55 years....
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1989-04-01 00:00:00
abstract:OBJECTIVE:To investigate whether the clinic-daytime blood pressure difference can provide information on vascular reactivity to stress comparable to that of simple noninvasive stimuli such as a cold pressor test and isometric exercise, and whether there is any relationship between this blood pressure difference and non...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199917030-00005
更新日期:1999-03-01 00:00:00
abstract:OBJECTIVE:To examine in older individuals at high cardiovascular risk whether following a Mediterranean diet decreased the necessity of antihypertensive drugs and modulated their associated cardiovascular risk. METHODS:In the PREvención con DIeta MEDiterránea study, we assessed whether volunteers randomly allocated to...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002765
更新日期:2021-01-25 00:00:00
abstract::Systolic blood pressure was measured on a total of 1855 occasions in 1307 children aged four and five years, and compared with values obtained since birth in the same children. There was a rapid rise in blood pressure in the first month of life. The mean blood pressure then only rose from 93 mmHg at six months to 98 m...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198410000-00009
更新日期:1984-10-01 00:00:00
abstract:OBJECTIVE:To investigate the relationship between hematocrit, blood pressure and other known cardiovascular risk factors. DESIGN:The Tecumseh Blood Pressure Study includes a cohort of subjects of average age 29.5 years (346 male, 277 female) who reside in Tecumseh, Michigan, USA. METHODS:The body weight; home, work a...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
abstract:INTRODUCTION:QT interval prolongation increases the risk of sudden death in several medical conditions. Patients with primary aldosteronism and salt-sensitive hypertension experience more cardiovascular events than those with normal-renin essential hypertension. QT interval prolongation might represent one of the risk ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000251908.93298.a0
更新日期:2006-12-01 00:00:00
abstract:BACKGROUND:Hypertension control is often inadequate in HIV patients. In a contemporary, nationwide cohort of Italian HIV-infected adults, we assessed time trends in hypertension prevalence, awareness, treatment, and control. We also evaluated predictors of cardiovascular events and of new-onset hypertension. METHODS:M...
journal_title:Journal of hypertension
pub_type: 杂志文章,多中心研究
doi:10.1097/HJH.0000000000001150
更新日期:2017-02-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to evaluate the 24-h urinary sodium excretion in children of 10-12 years at a school in the north of Portugal and to examine the influence on salt intake and blood pressure of three different educational interventions for 6 months. METHODS:Blood pressure (BP) and sodium excretion in ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328363572f
更新日期:2013-10-01 00:00:00
abstract:BACKGROUND:Arterial stiffness is an independent predictor of cardiovascular events and mortality in hypertensive patients. The influence of different antihypertensive drug classes on improving arterial stiffness beyond blood pressure reduction is not widely available. We aimed to determine whether the artery stiffness ...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析
doi:10.1097/HJH.0b013e328346a583
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVES:To study the relation between the blood pressure and the neurocognitive function within the full adult age range in a large population sample. DESIGN:A cross-sectional study of 936 healthy adults who were recruited from a register of family practices, stratified for age (24-81 years), sex, and occupational ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715100-00004
更新日期:1997-10-01 00:00:00
abstract::Hypertension was induced in marmosets by ligating the minor branch of one renal artery. The blood pressure (BP), measured by a tail-cuff method, increased to hypertensive levels within 4-5 weeks and the maximum increases occurred after 4-15 weeks (BP, mean +/- s.e.m. was 120 +/- 3 and 152 +/- 6 mmHg before and 10 week...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198712000-00015
更新日期:1987-12-01 00:00:00
abstract:OBJECTIVE:To investigate whether nondipping and diabetes are independently related to metabolic risk profile and prevalence of target organ damage in a population setting. METHODS:A population-based cohort of 70-year-old men (n = 1057) was examined with 24-h ambulatory blood pressure monitoring, euglycemic hyperinsuli...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200208000-00011
更新日期:2002-08-01 00:00:00
abstract::The haemodynamic effects associated with the onset of hypertension induced by infusion of adrenocorticotrophin (ACTH) were investigated in sheep. Analysis of haemodynamic data collected over 24 h by a computer-based monitoring system revealed that mean arterial pressure (MAP) was significantly increased after 4 h. Car...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1989-04-01 00:00:00
abstract:BACKGROUND:Despite data from animal models and observational studies that are generally supportive for the soy/isoflavones lowering blood pressure (BP) and improving vascular function, the current findings from clinical trials are still inconclusive. OBJECTIVES:To examine whether soy protein with isoflavones or isofla...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e32835c0905
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:Sleep-disordered breathing, predominantly obstructive sleep apnea (OSA), is highly prevalent in patients with hypertension. OSA may underlie the progression to resistant hypertension, partly due to increased activation of the sympathetic nervous system. This analysis of patients with and without OSA evaluate...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001142
更新日期:2017-01-01 00:00:00
abstract::Several myosin isoforms are expressed in smooth muscle, based upon both heavy and light chain polymorphisms. These myosin isoenzymes reveal distinct detachment rate constants, thus regulating the responsiveness of the VSMC contractile apparatus to Ca2+, as well as its energetical and mechanical behavior. ...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-199205000-00002
更新日期:1992-05-01 00:00:00
abstract::: We aimed to combine evidence from all heart failure trials that have investigated the effects of drugs with blood pressure (BP)-lowering properties to assess the extent to which such drugs reduce BP in heart failure, the association between the net change in BP between treatment arms and cause-specific outcomes and ...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析
doi:10.1097/HJH.0000000000002094
更新日期:2019-09-01 00:00:00
abstract:BACKGROUND:The retinal microvasculature provides a window to the cerebral vasculature and enables examination of changes in retinal caliber that may mimic those occurring in cerebrovascular disease. The association of central arterial stiffness and retinal vessel caliber in a population sample is not fully understood. ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002252
更新日期:2020-02-01 00:00:00
abstract:OBJECTIVE:To investigate the characteristics and expression of transforming growth factor (TGF)-beta receptor subtypes on vascular smooth muscle cells (VSMC) from spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto (WKY) rats. METHODS:The effects of TGF-beta 1 on DNA synthesis were evaluated by [3H]-th...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199508000-00003
更新日期:1995-08-01 00:00:00
abstract:BACKGROUND:Vascular and lung function develop and decline over the life course; both predict cardiovascular events and mortality but little is known of how they develop over time. We analysed their relationship in a multiethnic cohort study to test whether lung function from early adolescence to young adulthood affecte...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001455
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVE:Coronary heart disease (CHD) risk factors have been consistently related to an increase in carotid intima-media thickness (IMT) in selected populations. However, few studies were population-based and furthermore little attention has been given to the influence of CHD risk factors on IMT in low-risk population...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199917060-00004
更新日期:1999-06-01 00:00:00
abstract:OBJECTIVE:To assess the dilatory effectiveness of nitric oxide donors in resistance arteries of patients with arterial hypertension in comparison with that in those of normotensive controls. BACKGROUND:Endothelium-dependent vasodilation has been demonstrated to be impaired in arterial hypertension. Besides disturbance...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199607000-00014
更新日期:1996-07-01 00:00:00
abstract:OBJECTIVE:To ascertain the relationships between the kinetic properties of erythrocyte Na+-H+ exchange [maximum kinetic energy (Vmax), Michaelis constant (Km) for internal H+ and Hill's coefficient], Na+-Li+ (Vmax and Km for external Na+), and metabolic parameters in normotensive controls and hypertensive subjects. MA...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract::Basal platelet function was measured in 35 40-year-old men with untreated mild essential hypertension and compared with 44 age-matched normotensive men. The groups differed significantly with respect to platelet size in venous blood (hypertensive, 7.46 +/- 0.10 X 10(-15) l versus normotensive, 7.11 +/- 0.09 X 10(-15) ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1987-08-01 00:00:00
abstract:BACKGROUND:High sleep blood pressure (BP) has been suggested to be an independent risk factor for cardiovascular outcomes. To assess the applicability of sleep BP measured using a timer-equipped home device, we investigated the association between home device-measured sleep BP and large artery stiffness. METHODS:We pe...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002576
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVES:Remodeling of small resistance arteries is an early sign of target organ damage in hypertension. Peripheral capillary morphology abnormalities in hypertension are not well studied. The study objective was to determine whether altered capillary morphology is associated with SBP, DBP, or both in individuals wi...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32833e113b
更新日期:2010-11-01 00:00:00
abstract:OBJECTIVE:Experimental data show that ouabain is a modulator of the sodium-potassium pump, which plays an important role in sodium homeostasis and blood pressure regulation. We investigated the distribution of plasma ouabain in the general population in relation to blood pressure and other determinants of sodium homeos...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200308000-00010
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVE:Elevated blood pressure (BP) is associated with cardiovascular mortality. BP variability (BPV) is also associated with cardiovascular mortality. However, most studies evaluated hypertensive patients with a relatively short follow-up. We investigated in male workers the association between BPV and long-term al...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002447
更新日期:2020-09-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to estimate the prevalence and risk factors of prehypertension (Pre-HTN) and hypertension (HTN) among the adult population of Iran. METHODS:A nationwide cross-sectional survey was conducted from December 2004 to February 2005. The selection was conducted by stratified probability cl...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f2d34d
更新日期:2008-03-01 00:00:00
abstract:OBJECTIVE:Studies have shown that famine exposure during early life may increase the risk of cardiovascular disease (CVD), hypertension, and diabetes during adulthood. We aimed to assess whether exposure to the Chinese famine (1959-1961) modifies the association between hypertension and CVD. METHODS:We investigated da...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001496
更新日期:2018-01-01 00:00:00