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Keywords: spectral analysis
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Clin Sci (Lond) (2005) 108 (3): 225–230.
Published: 18 February 2005
...-spectral analysis fell in the patients to approx. one-third of the sensitivity estimated in the healthy controls whatever the position. This cardiovascular profile suggests a predominant vagal dysfunction with signs of vagal withdrawal and baroreflex failure, and relative preservation of the cardiac...
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Clin Sci (Lond) (2004) 107 (1): 55–61.
Published: 23 June 2004
...-term spectral analysis to evaluate autonomic control in subjects with recurrent vasovagal syncope. We assessed the ability of spectral indices of HR (heart rate) variability to predict tilt-test responses. A series of 47 outpatients with recurrent vasovagal syncope and with positive responses to head...
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Clin Sci (Lond) (2002) 103 (1): 81–88.
Published: 20 June 2002
... 18 4 2002 The Biochemical Society and the Medical Research Society © 2002 2002 baroreflex sensitivity cardiovascular variability coherence phenylephrine test spectral analysis transfer function. 81Clinical Science (2002) 103, 81 88 (Printed in Great Britain) Measuring baroreflex...
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Clin Sci (Lond) (2002) 103 (1): 43–51.
Published: 07 June 2002
... portal hypertension spectral analysis systemic haemodynamics transcranial Doppler. 43Clinical Science (2002) 103, 43 51 (Printed in Great Britain) Impaired sympathetic regulation of cerebral blood flow in patients with cirrhosis of the liver Alfonso LAGI*, Giacomo LAFFI , Simone CENCETTI*, Giuseppe...
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Clin Sci (Lond) (1999) 97 (4): 467–473.
Published: 24 August 1999
...C. ZAMARRÓN; P. V. ROMERO; J. R. RODRIGUEZ; F. GUDE Using spectral analysis of oximetry data, we prospectively evaluated the validity of this methodology in patients clinically suspected of suffering from obstructive sleep apnoea (OSA). A total of 233 outpatients were studied. Nocturnal oximetry...
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Clin Sci (Lond) (1999) 96 (6): 613–621.
Published: 11 May 1999
... of this α-adrenoceptor agonist. Blood pressure levels were normal and head-up tilt did not induce orthostatic hypotension in this moderate form of GBS. Power spectral analysis demonstrated marked alterations in cardiovascular variability. The overall heart period variability was markedly reduced...
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Clin Sci (Lond) (1998) 95 (3): 295–301.
Published: 01 September 1998
... period were analysed using fractal dimensions, approximate entropies and spectral analysis for the quantification of absolute and relative heart period variability in bands of ultra low (< 0.0033 ;Hz), very low (0.0033–0.04 ;Hz), low (0.04–0.15 ;Hz) and high (0.15–0.5 ;Hz) frequency. 3. Linear...
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Clin Sci (Lond) (1996) 90 (2): 97–103.
Published: 01 February 1996
... of human subjects. In the first protocol, core temperature was reduced by intravenous infusion of cold saline, while skin temperature was unchanged. The second protocol involved skin-surface warming and cooling until shivering developed. Power spectral analysis was performed using a fast Fourier...
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Clin Sci (Lond) (1995) 88 (1): 87–93.
Published: 01 January 1995
.... The effect of head-down tilt on finger blood pressure and heart rate fluctuations was studied by means of power spectral analysis in 12 healthy men. 2. Amplitude spectra of heart rate and blood pressure rhythmicity were estimated at the low-frequency (60–140 mHz, 10-s rhythm) and high-frequency (area under...
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Clin Sci (Lond) (1994) 87 (6): 655–661.
Published: 01 December 1994
... as a functional correlate. 2. Autoregressive spectral analysis of R-R interval variability from a surface ECG, was used in healthy control subjects ( n = 24, age 45 ± 4 years) and in subjects complaining of unexplained fatigue ( n = 53, age 46 ± 9 years) to obtain quantitative indices of the state...
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Clin Sci (Lond) (1993) 85 (4): 389–392.
Published: 01 October 1993
... rate variability was seen on standing while subjects breathed air, but this effect was blunted with N 2 O. 28 7 1992 4 6 1993 © 1993 The Biochemical Society and the Medical Research Society 1993 blood pressure heart rate nitrous oxide orthostasis spectral analysis Clinical...
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Clin Sci (Lond) (1989) 76 (6): 567–572.
Published: 01 June 1989
..., a new method of computerized analysis of respiratory sinus arrhythmia based on spectral analysis of electrocardiographic and respiratory signals. 3. Considering tests indicative of parasympathetic function, only the heart rate response to the deep breathing and the cross-correlation test were...