An Assessment of VLF-Amplitude in R-R Interval Variability during Periodic Physical and Mental Work Load
نویسندگان
چکیده
منابع مشابه
ECG R-R Interval Estimation
Magnetic resonance imaging (MRI) is a biomedical imaging modality that provides high resolution images and excellent soft tissue contrast [1]. This makes MRI a preferable imaging modality for many applications. One limitation of MRI is slow data acquisition. MRI acquires data in the Fourier domain one point at a time, usually until enough data has been collected to approximately satisfy Nyquist...
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The aim of this study was to evaluate possible cardiovascular autonomic dysfunction in migraine patients with the R-R interval variation (RRIV) measurement, which is an easy and reliable method for the evaluation of parasympathetic function. We studied 71 migraine patients in headachefree intervals (mean age: 31.6±8.9, range 13-57 years; 52 females and 19 males), all without any known heart dis...
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RECENT studies of the electrical activity of single cardiac fibers suggest that most, if not all, disturbances of rhythm have their origin in specialized cardiac tissues rather than in the muscle fibers of the atria or ventricles.' Similarly, many disorders of conduction result from disordered function of these same structures. Unfortunately, the leads employed in clinical electrocardiography f...
متن کاملR-R interval variation and sympathetic skin response in fibromyalgia.
BACKGROUND This study proposed to assess the autonomic nervous system (ANS) functions in fibromyalgia (FM) by using two electrophysiological tests, sympathetic skin response (SSR) and the heart rate variability named R-R interval variation (RRIV). METHODS Sympathetic skin response and RRIV were studied in 29 female patients with FM and 22 healthy age-matched female controls. R-R interval vari...
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We analyzed the effect of changing posture from supine to standing on the variability of R-R, P-R, and R-T intervals in 10 healthy volunteers using power spectral analysis. An electrocardiogram and respiratory trace were recorded before and after posture change. Variability in the P-R and R-T intervals was much less than in the R-R interval and demonstrated a lower low-frequency (LF)-to-high-fr...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Electronics, Information and Systems
سال: 1998
ISSN: 0385-4221,1348-8155
DOI: 10.1541/ieejeiss1987.118.1_85