Reference values for local arterial stiffness. Part B: femoral artery.

Objective: Carotid-femoral pulse wave velocity (PWV) is considered the gold standard measure of arterial stiffness, representing mainly aortic stiffness. As compared with the elastic carotid and aorta, the more muscular femoral artery may be differently associated with cardiovascular risk factors (CV-RFs), or, as shown in a recent study, provide additional predictive information beyond carotid-femoral PWV. Still, clinical application is hampered by the absence of reference values.

Reference values for local arterial stiffness. Part A: carotid artery.

Objective: Non-invasive measures of common carotid artery properties, such as diameter and distension, and pulse pressure, have been widely used to determine carotid artery distensibility coefficient - a measure of carotid stiffness (stiffness ∼1/distensibility coefficient). Carotid stiffness has been associated with incident cardiovascular disease (CVD) and may therefore be a useful intermediate marker for CVD. We aimed to establish age and sex-specific reference intervals of carotid stiffness.

Vascular dysregulation in normal-tension glaucoma is not affected by structure and function of the microcirculation or macrocirculation at rest: a case-control study.

In normal-tension glaucoma (NTG), optic nerve damage occurs despite a normal intraocular pressure. Studies implicating systemic blood pressure or, more recently, arterial stiffness in the pathophysiology of NTG have produced conflicting results. Our aim was to investigate whether NTG is associated with alterations in the macrocirculation or microcirculation, cardiac function, and peripheral and central hemodynamics.

Asymmetry in prevalence of femoral but not carotid atherosclerosis.

Objective(s): Atherosclerotic disease is caused by a combination of systemic and local factors (e.g. geometry) affecting local flow conditions.

Cardiovascular risk assessment in low-resource settings: a consensus document of the European Society of Hypertension Working Group on Hypertension and Cardiovascular Risk in Low Resource Settings.

The Global Burden of Diseases, Injuries, and Risk Factors Study 2010 confirms ischemic heart disease and stroke as the leading cause of death and that hypertension is the main associated risk factor worldwide. How best to respond to the rising prevalence of hypertension in resource-deprived settings is a topic of ongoing public-health debate and discussion. In low-income and middle-income countries, socioeconomic inequality and cultural factors play a role both in the development of risk factors and in the access to care.

Moxifloxacin dosing in post-bariatric surgery patients.

Introduction: Given the ever increasing number of obese patients and obesity related bypass surgery, dosing recommendations in the post-bypass population are needed. Using a population pharmacokinetic (PK) analysis and PK-pharmacodynamic (PD) simulations, we investigated whether adequate moxifloxacin concentrations are achieved in this population.

Methods: In this modelling and simulation study we used data from a trial on moxifloxacin PK.

Barriers to antipsychotic discontinuation in nursing homes: an exploratory study.

Objectives: Despite safety warnings on serious adverse effects and guidance advising discontinuation, antipsychotic use in nursing homes remains high. Studies documenting the barriers experienced to antipsychotic discontinuation are rare. This exploratory study investigates the willingness of nurses and general practitioners (GPs) as well as the barriers to undertake antipsychotic discontinuation.

Noninvasive assessment of carotid-femoral pulse wave velocity: the influence of body side and body contours.

Background: Recently, an expert group advised to measure carotid-femoral (cf) pulse wave velocity (PWV) on the right side of the body, and to use a sliding caliper when tape measure distance cannot be obtained in a straight line. The present study investigates the evidence for this advice by comparing the real travelled cf path lengths (RTPLs) at both body sides and comparing the straight distance (as can be obtained with a sliding caliper) with the tape measure distance.

Methods: RTPLs were measured with MRI in 98 individuals (49 men, age 21-76 years).

Expert consensus document on the measurement of aortic stiffness in daily practice using carotid-femoral pulse wave velocity.

Stiffness of elastic arteries like the aorta predicts cardiovascular risk. By directly reflecting arterial stiffness, having the best predictive value for cardiovascular outcome and the ease of its measurement, carotid-femoral pulse wave velocity is now considered the gold standard for arterial stiffness assessment in daily practice. Many different measurement procedures have been proposed.

Ambulatory arterial stiffness index does not accurately assess arterial stiffness.

Introduction: The ambulatory arterial stiffness index (AASI), derived from ambulatory blood pressure monitoring (ABPM) recordings, has been proposed as a surrogate marker of arterial stiffness. However, there is controversy to what extent it reflects stiffness or is affected by other parameters. Using a previously validated one-dimensional computer model of the arterial circulation, the relative importance of the different determinants of the AASI was explored.

The change in arterial stiffness over the cardiac cycle rather than diastolic stiffness is independently associated with left ventricular mass index in healthy middle-aged individuals.

Background: The current standard for arterial stiffness assessment, aortic pulse wave velocity (aPWV), is measured at diastolic pressure. Arterial stiffness, however, is pressure dependent. At the carotid artery level, the degree of this dependency can be quantified as the difference (ΔPWV) between systolic and diastolic (cPWVd) carotid pulse wave velocity.

Oral bioavailability of moxifloxacin after Roux-en-Y gastric bypass surgery.

Objectives: Roux-en-Y gastric bypass surgery is the most commonly performed procedure for the treatment of morbid obesity. This anatomical alteration may affect the absorption and consequently the bioavailability of oral drugs. This study aims to investigate the oral bioavailability of moxifloxacin in 12 healthy volunteers who underwent gastric bypass surgery.

Aortic stiffness and central wave reflections predict outcome in renal transplant recipients.

Although renal transplantation improves survival, cardiovascular morbidity and mortality remain significantly elevated compared with nonrenal populations. The negative impact of traditional, uremia-related, and transplantation-related risk factors in this process remains, however, largely unexplored. Surrogate markers such as aortic stiffness and central wave reflections may lead to more accurate cardiovascular risk stratification, but outcome data in renal transplant recipients are scarce.

Systematic appraisal of dementia guidelines for the management of behavioural and psychological symptoms.

Background: Within the treatment of dementia, management of behavioural and psychological symptoms (BPSD) is a complex component.

Purpose: We wanted to offer a pragmatic synthesis of existing specific practice recommendations for managing BPSD, based on agreement among systematically appraised dementia guidelines.

Data Sources: We conducted a systematic search in MEDLINE and guideline organisation databases, supplemented by a hand search of web sites.

Carotid to femoral pulse wave velocity: a comparison of real travelled aortic path lengths determined by MRI and superficial measurements.

Objectives: Carotid-femoral pulse wave velocity (PWV) is the gold standard method for determination of arterial stiffness. PWV is assessed by dividing travelled distance by travel time. Standardization and validation of the methodology for travelled distance measurement is of crucial importance.

Current and projected prevalence of arterial hypertension in sub-Saharan Africa by sex, age and habitat: an estimate from population studies.

Introduction: In sub-Saharan Africa (SSA), data on hypertension prevalence in terms of urban or rural and sex difference are lacking, heterogeneous or contradictory. In addition, there are no accurate estimates of hypertension burden.

Objective: To estimate the age-specific and sex-specific prevalence of arterial hypertension in SSA in urban and rural adult populations.

Comparison of central pressure estimates obtained from SphygmoCor, Omron HEM-9000AI and carotid applanation tonometry.

Background: The Omron HEM-9000AI is the first automated tonometer to provide an estimate of central SBP (cSBP), which is considered to be more predictive of cardiovascular events than brachial pressure. However, considerable differences between the cSBP estimate of Omron and that of SphygmoCor have been reported, but not explained. This study assesses the sources of differences between both cSBP estimates and provides a handle on which estimate is closest to reality.

The influence of tocolytic drugs on cardiac function, large arteries, and resistance vessels.

Purpose: Beta-2 adrenoceptor agonistic drugs like ritodrine have been the reference tocolytic drugs, but are associated with cardiovascular side-effects. Atosiban, a newer drug, is a competitive antagonist of oxytocin and has been claimed to have fewer cardiovascular side effects. Until now, there has mainly been a subjective reporting of adverse reactions and few objective cardiovascular data.

Telomere length and its associations with oxidized-LDL, carotid artery distensibility and smoking.

Oxidative stress is a key factor driving the aging of cells and arteries. Studies suggest that white blood cell (WBC) telomere length is an index of systemic aging. We, therefore, investigated the association between WBC telomere length and oxidized-LDL, and vascular aging, expressed by the distensibility of the carotid artery.