... blood volume frequency domain power spectral analysis sympathetic activity systolic pressure variation Clinical Science (2003) 105, 491 497 (Printed in Great Britain) 491 Respiratory-related arterial pressure variability as an indicator of graded blood loss: involvement of the autonomic nervous...

...Guido GRASSI; Gino SERAVALLE; Giovanni BERTINIERI; Carlo TURRI; Maria Luisa STELLA; Francesco SCOPELLITI; Giuseppe MANCIA Congestive heart failure (CHF) is characterized by a sympathetic activation and a baroreflex impairment whose degree is directly related to the clinical severity of the disease...

... power of the LF component of blood pressure variations and the LF/HF ratio of R–R interval were assumed as indexes of sympathetic activity. Standard haemodialysis induced hypotension in six patients (unstable) while a minor pressure decline was present in the other six (stable). Normalized blood volume...

... and the Medical Research Society 1997 amino acid catecholamine dihydroxyphenylacetic acid 3,4-dihydroxyphenylalanine noradrenaline sympathetic activity Clinical Science (1997) 92,423-430 (Printed in Great Britain) 423 Effects of ordinary meals on plasma concentrations of 3,4=dihydroxyphenylalanine...

...Guido Grassi; Giambattista Bolla; Gino Seravalle; Carlo Turri; Antonio Lanfranchi; Giuseppe Mancia 1. Although plasma noradrenaline and muscle sympathetic nerve traffic have been shown to be suitable markers of sympathetic activity in man, no study has systematically compared the reproducibility...

... control of heart period might be a reflection of the altered sympatho-vagal balance [23], a possibility which had been suggested Key words: p-adrenergic blockade, autonomic control, computer analysis, heart rate variability, sympathetic activity, vagal activity Abbreviations: PSD, power spectral density...

... capable of affecting blood pressure, are not reflected by alterations in plasma catecholamines. To modify these humoral indices significantly, the more drastic or more diffuse alterations in sympathetic activity that may be produced by manipulating low as well as high pressure reflexogenic areas...

...N. J. Rothwell; M. J. Stock brown adipose tissue diet energy balance sympathetic activity thermogenesis © 1983 The Biochemical Society and the Medical Research Society 1983 Clinical Science (1983) 64,19-23 19 CONTR 0 VERSIES IN MEDICINE Luxuskonsumption, diet-induced thermogenesis...

... is improved in SHR-SP on a potassium-substituted diet. 5. It is concluded that changes in dietary intake of sodium and potassium modulate sympathetic activity and the metabolism of noradrenaline, both of which are related to the development of hypertension in SHR-SP. © 1981 The Biochemical Society...

... treatment with prizidilol. © 1981 The Biochemical Society and the Medical Research Society 1981 adrenaline haemodynamics noradrenaline plasma volume prizidilol sympathetic activity Clinical Science (1981) 61 ,465~468s 465s Effects of prizidilol (SKF 92657) on blood pressure, haemo- dynamics...

... arterial values, but mean arterial values were no higher than in the essential hypertensive patients. 8. Local variations in sympathetic activity may occur without altering the plasma noradrenaline concentration measured in peripheral plasma. 6 3 1981 11 5 1981 © 1981 The Biochemical...

... can be a marker for both sympathetic activity and the α-adrenoceptor-mediated component of vascular resistance. 4 11 1980 24 11 1980 © 1981 The Biochemical Society and the Medical Research Society 1981 blood pressure neurogenic vasoconstriction plasma noradrenaline...

... activity in salt-loaded spSH rats than in spSH rats on a normal sodium diet. 5. It is concluded that salt loading results in a further increase of the already elevated sympathetic activity in spSH rats. © 1980 The Biochemical Society and the Medical Research Society 1980 adrenaline dopamine...

... studied. 3. Group T had signs of increased sympathetic activity at rest and enhanced sympatho-adrenal reactivity during stress. 4. Systolic blood pressure was consistently elevated in group T. 5. The T-wave aberrations may be explained by the increased sympathetic activity. 6. Several similarities exist...

... in five of six normotensive patients between the end of exercise and 2 min after exercise performed in the supine position. 5. Evidence in favour of a reflex increase in sympathetic activity after upright exercise is discussed. 11 1 1979 20 6 1979 © 1980 The Biochemical Society...

... transmural pressure (variable pressure neck-chamber technique) in order to obtain limited increases and reductions in sympathetic adrenergic activity. 2. When sympathetic activity was reflexly increased there was a rise in arterial pressure but no significant increase in plasma catecholamines. Likewise when...

...P. Thorén; S.-E. Ricksten 1. Recordings have been obtained from single sympathetic fibres to the left kidney in anaesthetized adult spontaneously hypertensive (SH) rats and Wistar—Kyoto normotensive (WK) rats. 2. Under control conditions SH rats had a mean sympathetic activity of 3·3 ± se 0·45 Hz...

... 1975 essential hypertension plasma renin activity sympathetic activity upright exercise Clinical Science and Molecular Medicine (1975) 49, 51 1-514. SHORT COMMUNICATION Plasma catecholamines and renin activity in response to exercise in patients with essential hypertension J. CHODAKOWSKA, K...

... sympathetic activity Clinical Science and Molecular Medicine (1975) 48, 239~242s. Plasma noradrenaline concentration and blood pressure in essential hypertension, phaeochromocytoma and depression W. J. LOUIS, A . E. D O Y L E A N D S. N. A N A V E K A R University of Melbourne, Department of Medicine...