نتایج جستجو برای: سیگنال hrv
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Human rhinovirus (HRV) is a leading cause of acute respiratory infection (ARI) in young children and infants worldwide and has a high impact on morbidity and mortality in this population. Initially, HRV was classified into two species: HRV-A and HRV-B. Recently, a species called HRV-C and possibly another species, HRV-D, were identified. In Mexico, there is little information about the role of ...
Human rhinoviruses (HRVs) and enteroviruses (HEVs) belong to the Enterovirus genus and are the most frequent cause of infection worldwide, but data on their molecular epidemiology in Africa are scarce. To understand HRV and HEV molecular epidemiology in this setting, we enrolled febrile pediatric patients participating in a large prospective cohort assessing the causes of fever in Tanzanian chi...
BACKGROUND Measurement of heart rate variability (HRV) is a useful method for examining cardiac autonomic control. HRV has been measured in many studies among adults, but research on this topic among children is limited. We therefore defined reference values for a large number of HRV parameters among children. METHODS The subjects were a population sample of 465 mainly prepubertal children 6-...
فیبریلاسیون دهلیزی به صورت یک تاکی آریتمی فوق بطنی تعریف می گردد که با فعالیت دهلیزی غیر هماهنگ و متعاقب آن وخامت عملکرد مکانیکی دهلیز مشخص می شود. این بیماری عملکرد قلب را مختل کرده و باعث افزایش خطر ایجاد لخته خونی در داخل دهلیزها و بروز سکته مغزی می شود. حدود 1% از جمعیت عمومی جهان به این بیماری مبتلا می باشند. بروز این بیماری در درصد بالایی از جمعیت جهان آن را به یک مشکل اجتماعی و اقتصادی ت...
OBJECTIVE Delayed heart rate (HR) recovery in the immediate postexercise period has been linked to adverse cardiovascular prognosis. The after effects of an acute bout of exercise on HR modulation in postmenopausal women (PMW) and the influence of estrogen therapy are unknown. METHODS In 13 sedentary PMW (54 ± 2 y, mean ± SEM), we assessed HR variability (HRV)--an index of HR modulation--and ...
دو دهه تحقیقات گسترده نشان می دهند که تغییرپذیری ضربان قلب (HRV) با تنظیم هیجان ها، سلامت و بیماری ارتباط مستقیم دارد. کاهش HRV با افزایش علائم افسردگی، پیشرفت بیماری عروق کرونر قلب و افزایش خطر مرگ و میر پس از رویدادهای قلبی همراه است. هدف از این مطالعه بررسی تأثیر افزایش فرکانس رزونانس HRV از طریق مداخلات روانشناختی بر کاهش افسردگی بیماران به دنبال جراحی عروق کرونر قلب بود. نمونۀ مورد مطالع...
BACKGROUND Reduced heart rate variability (HRV) is associated with a poor outcome in patients with sinus rhythm (SR) or atrial fibrillation (AF). However, cut-off points for HRV measures differ between SR and AF. We hypothesized that a global index of 24-hour HRV based on evaluation of scatterplot would describe HRV irrespective of cardiac rhythm. METHODS 407 patients with ischemic heart dise...
Human rhinovirus (HRV) replication triggers exacerbation of asthma and causes most acute respiratory illnesses (ARIs), which may manifest as influenza-like illness. The recent assignment of 60 previously unknown HRV types to a third HRV species, Human rhinovirus C, raised questions about the prevalence of these picornavirus types in the community, the extent of HRV diversity at a single site, a...
Human rhinovirus (HRV) remains a leading cause of several human diseases including the common cold. Despite considerable research over the last 60 years, development of an effective vaccine to HRV has been viewed by many as unfeasible due, in part, to the antigenic diversity of circulating HRVs in nature. Over 150 antigenically distinct types of HRV are currently known which span three species:...
To estimate the frequency, molecular epidemiological and clinical associations of infection with the newly described species C variants of human rhinoviruses (HRV), 3243 diagnostic respiratory samples referred for diagnostic testing in Edinburgh were screened using a VP4-encoding region-based selective polymerase chain reaction (PCR) for HRV-C along with parallel PCR testing for 13 other respir...
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