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Results 551 - 600 of 1364
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Myers M G - - 1999
To provide background information on the scientific basis for new Canadian guidelines on ambulatory blood pressure monitoring and the process for developing recommendations for clinical practice. A comprehensive review of the literature on ambulatory blood pressure monitoring was conducted using a computerized literature search and a bibliography of key scientific ...
Myers MG - - 1999
OBJECTIVE: To provide background information on the scientific basis for new Canadian guidelines on ambulatory blood pressure monitoring and the process for developing recommendations for clinical practice. DATA SOURCES: A comprehensive review of the literature on ambulatory blood pressure monitoring was conducted using a computerized literature search and a bibliography ...
Jacob R G - - 1999
BACKGROUND: The relation between mood or emotions and concurrent ambulatory blood pressure responses holds both fundamental and clinical interest. METHODS: The primary sample consisted of 69 normotensive or borderline hypertensive but otherwise healthy adult males. The validation sample consisted of 85 healthy male undergraduate college students. Both samples underwent half-hourly ...
Baer C A - - 1999
The efficacy of electronic monitoring in the home care of heart failure (HF) patients has not been widely reported. We developed a Vital Sign System (VSS) monitoring device capable of measuring the weight, blood pressure, and heart rate of congestive heart failure (CHF) patients in the home and transmitting these ...
Harshfield G A - - 1999
BACKGROUND: The use of ambulatory blood pressure monitoring for pediatric populations is increasing. OBJECTIVE:; To determine the 2-year stability of ambulatory blood pressure in youths. METHODS: We evaluated 2-year stabilities of resting and ambulatory blood pressures in 197 youths (aged 13.9+/-2.3 years at initial evaluation). Readings were taken every 20 ...
Kok R H - - 1999
OBJECTIVE: To evaluate the reproducibility and relationship with left ventricular mass index of home blood pressure in comparison with ambulatory and office blood pressures. METHODS: We measured home, ambulatory and office blood pressures of 84 previously untreated hypertensive patients, aged 60-74 years, from primary care, at baseline and after 12 ...
Palatini P - - 1999
OBJECTIVE: To determine whether the prediction of target-organ damage varies according to the reproducibility of 24 h blood pressure. SETTING: Seventeen hypertension clinics in northeast Italy. MAIN OUTCOME MEASURES: Correlations of left ventricular mass index and albumin excretion rate with 24 h and office blood pressures in relation to tertiles ...
Mattana J - - 1999
BACKGROUND: Systolic blood pressure is well known to increase significantly with age and is strongly correlated with stroke and coronary artery disease. We and other investigators have reported a low prevalence of hypertension in subgroups of patients with HIV infection. In the present study, we examined an ambulatory population of ...
Tartaro A - - 1999
BACKGROUND AND PURPOSE: Leukoaraiosis (LA) has been defined as low attenuation areas involving only the periventricular white matter, in the mild form, and extending to the subcortical region in the severe form. This study evaluates, in elderly patients, if brain computed tomography (CT) evidence of LA significantly correlates with the ...
Johnson K A - - 1999
We performed a randomized, single-visit, crossover study to compare the precision of a digital monitor and an aneroid monitor relative to a desktop mercury sphygmomanometer (DMS). Three blood pressure measurements per patient, one per device, were taken over 25 minutes. Of 99 patients, 95 had complete blood pressure data. Systolic ...
Vanhaecke J - - 1999
OBJECTIVE: To study the effect of the environment--in-hospital vs. out-patient situation--on blood pressure as measured by ambulatory blood pressure monitoring (ABPM). PATIENTS AND METHODS: Twenty-four hour ABPM was performed sequentially in-hospital and again 9+/-3 days later on an out-patient basis, in 30 consecutive heart transplant recipients (27 men, median age ...
Aylett M - - 1999
The use of mercury is likely to be prohibited within a few years and clinicians have not yet seriously considered what sphygmomanometers they will use, nor is authoritative advice available on alternative instruments. Doubts also surround the thorny question of cuff size. Most blood pressures are taken in assessing cardiovascular ...
Yarows S A - - 1999
BACKGROUND: Patients and doctors often use home blood pressure monitoring (HBPM) to assess the control of hypertension. Despite its popularity there has always been some uncertainty with regard to its accuracy, reliability, reproducibility, and comparability. Although there are pre-market HBPM standards of accuracy, there are no standards to assure accuracy ...
Staessen J A - - 1999
The technique of noninvasive ambulatory blood pressure monitoring is now well established as an instrument in clinical research and as a diagnostic tool in clinical practice. Diagnostic thresholds for ambulatory monitoring were derived by averaging the 95th percentiles of the ambulatory blood pressure measurements in the normotensive subjects enrolled in ...
Lusardi P - - 1999
The influence of acute sleep deprivation during the first part of the night on 24-h blood pressure monitoring (ABPM) was studied in 36 never-treated mild to moderate hypertensive patients. According to a crossover design, they were randomized to have either sleep deprivation or a full night's sleep 1 week apart, ...
White W B - - 1999
For many years, it has been evident that ambulatory blood pressure monitoring is superior to the measurement of office blood pressure as a predictor of target-organ involvement in patients with hypertension. Until recently, there were far fewer data on the relationship between 24 h ambulatory blood pressure and cardiovascular outcomes ...
Casiglia E - - 1999
OBJECTIVE: A circadian rhythm of blood pressure has been demonstrated both in subjects who are physically active during the day and in those confined to bed. The study of the circadian rhythm of arterial flow and peripheral resistance, on the other hand, is limited to pioneer experiments. This paper is ...
Pickering T G - - 1999
The clinical use of ambulatory blood pressure monitoring requires that a 'normal' limit be identified. However, because the relationship between blood pressure and risk is continuous, any such limit is arbitrary. Various different methods have been used to define a normal limit, and can be divided into those that rely ...
Neutel J M - - 1999
Measurements of trough blood pressure in a clinic setting have been the traditional method of assessing the efficacy of antihypertensive agents. The duration of action of antihypertensive drugs has been assessed by calculation of a trough-to-peak ratio; drugs with a trough-to-peak ratio greater than 50% are typically given once-a-day indications. ...
Ozdemir R - - 1999
The objective of this study was to assess the blood pressure pattern in patients with nasal polyposis. Twenty-seven patients with nasal polyposis (18 males and 9 females), ranging in age from 15 to 72 years (mean 37.1 years) were eligible for inclusion in the study. All patients were hospitalized overnight ...
Brondolo E - - 1999
Ambulatory blood pressure monitoring was used to investigate the cardiovascular correlates of naturally occurring interpersonal interactions. Participants were New York City traffic agents, who routinely engage in conflict-prone communication with the public under relatively fixed conditions. Talking with the public, supervisors, or coworkers was associated with levels of systolic and ...
Zvan B - - 1998
Cold pressor test (CPT) evokes generalized activation of the sympathetic nervous system (SNS). The activity of SNS may be estimated by monitoring the mean blood velocity (v(m)) in the middle cerebral artery (MCA) by using a transcranial Doppler monitoring system (TCD). To determine the response of SNS, we studied the ...
Billiet E - - 1998
OBJECTIVE: The dynamic distortion introduced by manometric systems has been known for many years, with several methods developed to describe and quantify the degree of distortion. We developed the Gabarith as a technique to describe more accurately, and yet more simply, the dynamic accuracy of the chain of monitoring. SETTING: ...
Sherwood A - - 1998
A wearable, ambulatory impedance monitor (AIM) has been developed to permit impedance cardiographic measurements while patients and volunteers engage in normal daily activities. The AIM system was developed for use with a new hybrid tetrapolar spot-band electrode configuration and was designed to be comfortable and inconspicuous. The objective of the ...
Verdecchia P - - 1998
A wide pulse pressure (PP) is a marker of increased artery stiffness and high cardiovascular (CV) risk. To investigate the prognostic value of ambulatory PP, which is currently unknown, we studied 2010 initially untreated subjects with uncomplicated essential hypertension (mean age, 51.7 years; 52% men). All subjects underwent baseline procedures ...
Punzi H A - - 1998
Factors that affect the reliability and accuracy of blood pressure measurements are reviewed, and new technologies for measuring blood pressure are discussed. Blood pressure measurements obtained in an office, hospital, or clinic are subject to variation and error. Reasons for variations include the wrong cuff size, improper inflation or deflation ...
Ferrara A L - - 1998
Ambulatory blood pressure monitoring allows a better understanding of blood pressure fluctuations over 24 h than simple clinic measurements. In this way the diagnosis of "white coat" versus "sustained" hypertension and that of "dipper" (patient with blood pressure fall during nighttime > 10% of daytime levels) versus "nondipper" status were ...
Motohashi Y - - 1998
The effects of night shift schedules on circadian time structure of blood pressure were studied in seven healthy young subjects by continuous monitoring of blood pressure every 30 min for 72 h. In the control experiment, subjects were instructed to sleep at regular times with the light off at 00.00 ...
Kawano Y - - 1998
OBJECTIVE: To study the effects of a high calcium intake in hypertensive patients by blood pressure monitoring. DESIGN: In a randomized crossover study, patients were assigned to an 8-week calcium supplementation period and an 8-week control period. The subjects were given 25 mmol/day (1 g/day) of calcium as calcium carbonate ...
Sega R - - 1998
OBJECTIVE: Clinic blood pressure values are known to change according to seasonal influences. We therefore examined home and 24 h ambulatory blood pressure values to determine whether these measurements are also affected by the seasons. DESIGN AND METHODS: In 2051 subjects of the Pressione Arteriose Monitorate E Loro Associazioni (PAMELA) ...
Hardy D O - - 1998
Twenty-four mildly hypertensive sedentary men were randomly assigned to one or two control conditions of health education or a treatment of a single bout of strength training. The men were rotated through the conditions until each man had participated in the treatment and both control conditions. Blood pressure was measured ...
Mar J - - 1998
Random variability of blood pressure complicates the diagnosis and subsequent treatment of hypertension. To evaluate the importance of the number of blood pressure measurements in the correct diagnosis and control of hypertension, the authors used a Bayesian model to estimate the true average blood pressure of a group of newly ...
Walker S P - - 1998
Hypertensive disorders of pregnancy remain a major cause of maternal and perinatal morbidity and mortality. Diagnosis and management of these disorders has relied on conventional blood pressure measurement, a technique fraught with error and uncertainty. Ambulatory blood pressure measurement is a promising new technique that has the potential to overcome ...
Bolinder G - - 1998
Ambulatory 24-h blood pressure monitoring was conducted in 135 healthy, normotensive, middle-aged (35 to 60 years) men, with no antihypertensive medication, to study the influence of habitual smokeless tobacco use (n = 47) and smoking (n = 29) on diurnal blood pressure and heart rate. Comparisons were made with nonusers ...
Mancia G - - 1998
SURROGATE END-POINTS FOR PROGNOSIS OF HYPERTENSION: The identification of surrogate measures of cardiovascular risk in patients with hypertension may allow clinicians to better estimate a patient's long-term prognosis and monitor the effects of antihypertensive therapy in reducing risk and thereby reducing the cardiovascular complications of hypertension. PROGNOSTIC LIMITATIONS OF OFFICE ...
Rasmussen S L - - 1998
OBJECTIVE: To determine normal values for 24 h ambulatory blood pressure in a Danish population and to study the relationship to casual blood pressure. STUDY POPULATION: A random sample of 2656 Danish men and women participated in a population survey. The participants were selected in age groups and were aged ...
van Boxtel M P - - 1998
OBJECTIVE: Associations between the outcome of 24 h ambulatory monitoring and cognitive performance were studied in order to evaluate the potential relevance of ambulant blood pressure status to brain function. It was hypothesized that a small daytime-night-time difference in mean blood pressure (nondipping) is associated with reduced cognitive performance, in ...
Baker B - - 1998
One hundred seventy-six unmedicated mildly hypertensive subjects (113 men, 63 women) underwent M-mode echocardiography to determine left ventricular mass (LVM) and relative wall thickness (RWT), 24-h ambulatory blood pressure monitoring, and completed standardized questionnaires measuring marital and job stress. Subjects were aged 46 +/- 9 years old; 45.4% had daytime ...
Brueren M M - - 1998
BACKGROUND: Several studies have reported overdiagnosis and overtreatment of hypertensive patients, especially in borderline hypertensives. AIM: To find a blood pressure measurement procedure that reduces the risk of misclassification to an acceptable level. METHOD: Comparative, prospective study over seven months of primary care patients with elevated initial blood pressures. Blood ...
Bussmann J B - - 1998
The objective of the study was to assess the validity of an activity monitor (AM) within a psychophysiological study. The AM was based on four body-fixed accelerometers and discriminated postures, transitions, and dynamic activities. Three subjects participated in each of two 4-hr sessions. During each session, consisting of two protocols, ...
Omboni S - - 1998
The objectives of our study were to assess the reproducibility of the trough-to-peak ratio (T/P) and to see whether a high T/P is accompanied by more organ protection or vice versa. The study included 175 (mean+/-SD age, 51+/-9 years) subjects with mild-moderate essential hypertension who had echocardiographic evidence of left ...
Kristal-Boneh E - - 1998
OBJECTIVE: To clarify whether somatic complaints in healthy normotensive men are associated with differential 24-hour blood pressure and heart rate measures. METHOD: Twenty-four-hour ambulatory systolic and diastolic blood pressure was monitored in 114 healthy normotensive men, aged 28 to 63 years, engaged in similar physical work. Means were calculated for ...
Prisant LM - - 1998
The use of data from ambulatory blood pressure monitoring has the potential to shift how we think about assessing the cardiovascular risk factor of blood pressure. Group mean 24 h, 12 h, 8 h, and hourly blood pressures for two recordings are highly reproducible. A single 24 h ambulatory blood ...
Mas D - - 1998
BACKGROUND: Ambulatory measurement for the QKD interval is a new method for evaluation of the rigidity of large arterial trunks. Reliable indices of arterial rigidity can be distilled from the large number of measurements (usually around 100) obtained during 24 h monitoring. OBJECTIVE: To describe a shorter standardized protocol (4 ...
Ohkubo T - - 1998
Although reference values for ambulatory blood pressure (ABP) monitoring have been investigated in several population studies, these values were derived from cross-sectional observations and were based merely on the statistical distribution of blood pressure values. Therefore, we conducted a prospective cohort study to identify reference values for 24-hour ABP in ...
Ho K Y - - 1998
BACKGROUND/AIM OF STUDY: Data on prolonged ambulatory oesophageal pH and pressure monitoring in normal subjects in the East are limited. This study aimed to define the normal characteristics of ambulatory oesophageal pH and motility among healthy adults in Singapore. METHOD: Prolonged ambulatory oesophageal pH and pressure recording was performed on ...
Brown D E - - 1998
Although several studies have examined differences in daily blood pressure variability between African-American and Caucasian groups in the United States, little is known about the blood pressure variation of other ethnic groups. This study examined the effects of emotional state, setting, posture, and ethnicity on the ambulatory blood pressure of ...
Palatini P - - 1998
BACKGROUND: Results of several studies have shown that subjects with white-coat hypertension (WCH) have more target-organ damage than do normotensive controls with similar ambulatory blood pressures. OBJECTIVE: To investigate whether this is due to a selection bias. SETTING: Seventeen hypertension clinics in northeast Italy. MAIN OUTCOME MEASURES: Echocardiographic data in ...
Mengden T - - 1998
The acceptable maximal blood pressure values for patients monitoring their own blood pressure at home have not yet been determined. Risk of cardiovascular disease may be increased at lower blood pressure limits than those suggested by the World Health Organization (WHO) for clinic readings. We have investigated 25 patients with ...
Clausen P - - 1998
A slightly elevated urinary albumin excretion rate (UAER) is a predictor of atherosclerotic cardiovascular disease. The mechanism is unknown, but moderate office blood pressure elevation has been demonstrated as part of a clustering of known atherosclerotic risk factors in subjects with elevated UAER. Because 24-hour ambulatory blood pressure is a ...
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