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Keyword: heart rate
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Clin Sci (Lond) (2013) 124 (2): 109-114.
Published: 26 September 2012
...Walker B. Plash; André Diedrich; Italo Biaggioni; Emily M. Garland; Sachin Y. Paranjape; Bonnie K. Black; William D. Dupont; Satish R. Raj POTS (postural tachycardia syndrome) is characterized by an increased heart rate (ΔHR) of ≥30 bpm (beats/min) with symptoms related to upright posture. Active...
Clin Sci (Lond) (2012) 122 (6): 271-279.
Published: 11 November 2011
... (intraduodenal) glucose loads on BP, HR (heart rate), SMA (superior mesenteric artery) flow and vascular conductance and plasma NA (noradrenaline) in ‘young’ and ‘older’ subjects. A total of 12 ‘young’ (six male and six female; age, 22.2±2.3 years) and 12 ‘older’ (six male and six female; age, 68.7±1.0 years...
Clin Sci (Lond) (2012) 122 (1): 25-31.
Published: 12 September 2011
...Jordan A. Brewster; Emily M. Garland; Italo Biaggioni; Bonnie K. Black; John F. Ling; Cyndya A. Shibao; David Robertson; Satish R. Raj Patients with POTS (postural tachycardia syndrome) have excessive orthostatic tachycardia (>30 beats/min) when standing from a supine position. HR (heart rate...
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...
Clin Sci (Lond) (2002) 102 (5): 495-500.
Published: 10 April 2002
...; 0.01) without a significant effect on heart rate, and reduced calculated forearm vascular resistance (from 49.1±5.4 to 31.3±3.9 arbitrary units, P < 0.01). In conclusion, acute elevation of FFA in healthy men increases arterial blood pressure and reduces vascular resistance. These haemodynamic...
Clin Sci (Lond) (2002) 102 (1): 31-38.
Published: 03 December 2001
...Yoshiyuki FUKUOKA; Yoko NAKAGAWA; Katsutoshi OGOH; Tomoyuki SHIOJIRI; Yoshiyuki FUKUBA The purpose of the present study was to define the influence of age and exercise training on the heart rate (HR) dynamic response (i.e. kinetics) to sinusoidal work. A total of 63 healthy subjects (31 men and 32...
Clin Sci (Lond) (2001) 101 (6): 559-566.
Published: 24 October 2001
... compared the effects of candesartan and placebo on baroreflex sensitivity and on heart rate variability at rest, during stress and during 24h monitoring. Acute effects were assessed 4h after oral candesartan (8mg) and chronic effects after 4 weeks of treatment (dose titrated to 16mg daily). The study group...
Clin Sci (Lond) (2000) 98 (4): 455-460.
Published: 21 March 2000
... increases in both P v i and heart rate. After vitamin C pre-treatment, no increase in P v i was observed in response to the smoke inhalation; however, whilst heart rate still increased significantly, the duration of this response was attenuated. The results suggest that vitamin C affords protection against...
Clin Sci (Lond) (1999) 97 (4): 391-397.
Published: 24 August 1999
...Isabelle CONSTANT; Dominique LAUDE; Isabelle MURAT; Jean-Luc ELGHOZI To investigate the differences between heart rate (HR) variability and pulse rate (PR) variability, short-term variability of finger pulse wave and ECG signals were studied in 10 children with a fixed ventricular pacemaker rhythm...
Clin Sci (Lond) (1999) 96 (6): 663-664.
Published: 11 May 1999
...F. DE LORENZO; Z. KADZIOLA; V. V. KAKKAR 3 2 1999 The Biochemical Society and the Medical Research Society © 1999 1999 autonomic nervous system blood pressure cold adaptation heart rate myocardial infarction risk factors 663Clinical Science (1999) 96, 663ñ664 (Printed in...
Clin Sci (Lond) (1998) 95 (6): 687-692.
Published: 01 December 1998
... sodium nitroprusside. Aldosterone had no significant effect on resting blood pressure, heart rate or baroreflex response to sodium nitroprusside. However, reflex responses to phenylephrine were impaired with aldosterone ( P < 0.01) while blood pressure responses were unaltered. Baroreflex sensitivity...
Clin Sci (Lond) (1998) 95 (3): 241-248.
Published: 01 September 1998
...-aminobutyric acid benzodiazepines heart rate vagal neurons 241Clinical Science (1998) 95, 241 248 (Printed in Great Britain) A central c-aminobutyric acid mechanism in cardiac vagal control in man revealed by studies with intravenous midazolam Matthew R. FARMER, Julian C. VAILE*, Faisal OSMAN*, Hamish F...
Clin Sci (Lond) (1998) 95 (3): 295-301.
Published: 01 September 1998
... heart period and heart rate. This article evaluates the differences in using heart rate versus heart period to estimate fractal dimensions and approximate entropies of these time series. 2. Twenty-four-hour ECG was recorded in 23 normal subjects using Holter records. Time series of heart rate and heart...
Clin Sci (Lond) (1998) 95 (1): 33-42.
Published: 01 July 1998
...Isabelle CONSTANT; Elizabeth VILLAIN; Dominique LAUDE; Arlette GIRARD; Isabelle MURAT; Jean-Luc ELGHOZI 1. To investigate the influence of heart rate variability on blood pressure variability, short-term variability in heart rate and blood pressure was studied in 10 children with fixed ventricular...
Clin Sci (Lond) (1997) 93 (4): 325-333.
Published: 01 October 1997
... control subjects, nine diabetic patients without cardiovascular autonomic neuropathy (CAN-) and 12 diabetic patients with cardiovascular neuropathy (CAN +). Resting 12-lead ECG was recorded for measurement of maximal QT interval and QT dispersion. The QT interval was heart rate corrected using Bazett's...
Clin Sci (Lond) (1997) 93 (1): 21-28.
Published: 01 July 1997
...Laure Cloarec-Blanchard; Christian Funck-Brentano; Margorzata Lipski; Patrice Jaillon; Isabelle MacQuin-Mavier 1. Changes in the low-frequency (LF) components of blood pressure and heart rate variability and in the ratio of LF to high-frequency (HF) components of heart rate variability (LF/HF ratio...
Clin Sci (Lond) (1997) 92 (6): 543-550.
Published: 01 June 1997
...Gary C. Butler; Shin-Ichi Ando; John S. Floras 1. There is a substantial non-harmonic or fractal component to the variability of both heart rate and blood pressure in normal subjects. Heart rate is the more complex of these two signals, with respect to the slope, β, of the 1/ f β relationship. In...
Clin Sci (Lond) (1997) 92 (4): 335-343.
Published: 01 April 1997
...Cornelius Keyl; Peter Lemberger; Michael Pfeifer; Karin Hochmuth; Peter Geisler 1. Periodic breathing is known to be associated with cyclic fluctuations in heart rate. The purpose of this study was to evaluate the capability of spectral analysis of heart rate variability to identify episodes with...
Clin Sci (Lond) (1996) 91 (1): 45-50.
Published: 01 July 1996
.... 1 3 1996 8 3 1996 © 1996 The Biochemical Society and the Medical Research Society 1996 ambulatory monitoring blood pressure EEG arousal heart rate sleep sympathetic nervous system Clinical Science (1996) 91, 45-50 (Printed in Great Britain) Ambulatory monitoring of blood...
Clin Sci (Lond) (1996) 90 (2): 87-89.
Published: 01 February 1996
...% versus placebo −7.8% (medians), P < 0.01 for all]. 3. Mean blood pressure and heart rate increased significantly after epoprostenol, but were unchanged during placebo infusion [8 ng min −1 kg −1 ; mean blood pressure: epoprostenol −5.6% versus placebo 3.2%; heart rate: epoprostenol 32.7% versus...
Clin Sci (Lond) (1995) 89 (6): 557-564.
Published: 01 December 1995
...Theo J. C. Faes; Nico N. D. De Neeling; Rene Kingma; Ben J. TenVoorde; John M. Karemaker 1. Disorders of the autonomic nervous system are frequently diagnosed by measuring heart rate changes in response to deep-breathing and lying-to-standing manoeuvres. The heart rate changes in these manoeuvres...
Clin Sci (Lond) (1995) 88 (1): 95-102.
Published: 01 January 1995
...Isabelle Constant; Arlette Girard; Jérôme Le Bidois; Elizabeth Villain; Dominique Laude; Jean-Luc Elghozi 1. The aim of the study was to examine the short-term variability in blood pressure and heart rate in 19 children who had received heart transplants and in eight normal control children. 2...
Clin Sci (Lond) (1995) 88 (1): 87-93.
Published: 01 January 1995
... 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...
Clin Sci (Lond) (1994) 87 (5): 553-558.
Published: 01 November 1994
... 27 4 1994 7 6 1994 © 1994 The Biochemical Society and the Medical Research Society 1994 autonomic failure cardiac output central blood volume heart rate orthostatic hypotension stroke volume systemic vascular resistance venous pooling Clinical Science (1994) 87, 553-558...
Clin Sci (Lond) (1994) 87 (4): 397-401.
Published: 01 October 1994
... stroke distance or heart rate were seen with either angiotensin II or aldosterone infusion. 3. Compared with placebo, angiotensin II infusion produced a dose-related prolongation of the isovolumic relaxation time [mean and 95% confidence intervals 12.0 (8.2–15.8) ms, P < 0.001] at 10 ng min −1 kg −1...
Clin Sci (Lond) (1993) 85 (4): 389-392.
Published: 01 October 1993
...D. C. Galletly; P. D. Tobin; B.J. Robinson; T. Corfiatis 1. Periodicities in cardiac interbeat interval may be resolved into discrete frequency components by applying Fourier analysis to heart rate time series. Low-frequency components (<0.15 Hz) are believed to be under parasympathetic and...
Clin Sci (Lond) (1993) 85 (2): 157-163.
Published: 01 August 1993
... mmHg) with a rise in heart rate (107±16 beats/min) from baseline (98±17 beats/min). Pressor responses to angiotensin II during D-glucose infusion (6 ng min −1 kg −1 , 99±10 mmHg; 18 ng min −1 kg −1 , 140±15 mmHg; 54 ng min −1 kg −1 , 157±12 mmHg; 162 ng min −1 kg −1 , 178±14 mmHg) showed a parallel...
Clin Sci (Lond) (1992) 83 (2): 149-155.
Published: 01 August 1992
.... Continuous responses of blood pressure and heart rate were recorded by Finapres. A pulse contour algorithm applied to the finger arterial pressure waveform was used to assess stroke volume responses. 2. During the first 30 s (initial phase), an almost identical drop in mean blood pressure was found in both...
Clin Sci (Lond) (1992) 82 (4): 357-362.
Published: 01 April 1992
... investigate the effects of training on both the vagal and sympathetic reflex heart rate responses to blood pressure changes. 2. Using 10 healthy males in a randomized cross-over design, we examined the effects of three 30 min cycling sessions at 70% of maximal capacity for 4 weeks on the steady-state reflex...
Clin Sci (Lond) (1991) 81 (2): 241-248.
Published: 01 August 1991
...W. Wieling; A. D. J. ten Harkel; J. J. van Lieshout 1. In 31 consecutively referred patients (20 females, 11 males) with overt or suspected orthostatic disorders, the changes in blood pressure and heart rate that occur in the first 2 min of standing were analysed. 2. Blood pressure was measured...
Clin Sci (Lond) (1991) 81 (1): 51-58.
Published: 01 July 1991
...J. H. A. Dambrink; B. P. M. Imholz; J. M. Karemaker; W. Wieling 1. The magnitude and time course of circulatory adaptation to active standing were investigated in healthy premenarchic girls and boys ( n = 24; 10–14 years old) by non-invasive measurement of heart rate and continuous finger blood...
Clin Sci (Lond) (1989) 77 (3): 305-310.
Published: 01 September 1989
...E. J. Van Lieshout; J. J. Van Lieshout; A. D. J. Ten Harkel; W. Wieling 1. The relationship between blood pressure and heart rate responses to coughing was investigated in 10 healthy subjects in three body positions and compared with the circulatory responses to commonly used autonomic function...
Clin Sci (Lond) (1989) 76 (5): 523-528.
Published: 01 May 1989
... total baroreflex arc by the Valsalva manoeuvre measuring only heart rate changes proved impossible, since the magnitude and time course of the heart rate response were normal notwithstanding the presence of a blood pressure response typical of sympathetic failure. 3. Sustained handgrip, cold pressor...
Clin Sci (Lond) (1988) 75 (6): 615-619.
Published: 01 December 1988
...Jacques Lenders; Harry Houben; Rudolf Van Valderen; Jacques Willemsen; Theo Thien 1. To determine the reproducibility of a mental arithmetic stress test and a handgrip exercise test, we studied the responses of blood pressure, heart rate, forearm blood flow and plasma catecholamines on two...
Clin Sci (Lond) (1988) 75 (3): 293-300.
Published: 01 September 1988
... opioid antagonism on the responses of blood pressure, heart rate and several hormones to exercise were therefore studied in 10 normal men. They exercised in the supine position up to 33% and 66% of their maximal exercise capacity and received in a randomized double-blind cross-over protocol, either...
Clin Sci (Lond) (1988) 75 (3): 285-291.
Published: 01 September 1988
... sustained effects after the termination of the isoprenaline infusions, as has been observed previously after the infusion of adrenaline. 2. The isoprenaline infusions produced dose-dependent increases in heart rate, systolic blood pressure and metabolic rate, but similar increases in calf blood flow and...
Clin Sci (Lond) (1988) 75 (2): 209-215.
Published: 01 August 1988
... in nine patients with thyrotoxicosis and in seven normal volunteers. All subjects were women, with equivalent ages in both groups. Six of the nine patients with hyperthyroidism were reevaluated after clinical compensation of the disease with propylthiouracil. 2. Heart rate responses were evaluated...
Clin Sci (Lond) (1987) 73 (4): 411-416.
Published: 01 October 1987
...D. J. Stott; S. G. Ball; G. C. Inglis; D. L. Davies; R. Fraser; G. D. Murray; G. T. McInnes 1. The effects of a single moderate dose of alcohol on blood pressure, heart rate and associated metabolic and endocrine changes were studied in 10 healthy subjects and compared with those of an isocaloric...
Clin Sci (Lond) (1987) 72 (5): 639-645.
Published: 01 May 1987
... < 0.01) and reduced mean arterial pressure (cuff measurement) from 96.0 ± 1.0 to 82.3 ± 0.9 mmHg. The changes in R–R interval induced by carotid baroreceptor stimulation were virtually identical with those observed in the absence of immersion. However, owing to the lower baseline heart rate during...
Clin Sci (Lond) (1987) 72 (4): 423-428.
Published: 01 April 1987
... an increase in heart rate. Subsequently, cardiac stroke volume and cardiac output fell during the strain to lows of − 40 ± 6% and − 21 ± 3% respectively at 15 s. 3. There was a sustained increased in cardiac output (maximum + 17 ± 4%) in the late post strain period. 4. The mean coefficient of...
Clin Sci (Lond) (1987) 72 (2): 239-244.
Published: 01 February 1987
...Benedito C. Maciel; Lourenco Gallo, Jr; José A. Marin Neto; Léa M. Z. Maciel; Maria L. D. Alves; Glória M. F. Paccola; Nassim Iazigi 1. The mechanisms that control resting heart rate in hyperthyroidism were evaluated in six patients before and after treatment with propylthiouracil. 2. The patients...
Clin Sci (Lond) (1986) 71 (4): 457-460.
Published: 01 October 1986
...B. C. Maceel; L. Gallo, Jr; J. A. Marin Neto; E. C. Lima Filho; L. E. B. Martins 1. The relative contribution of the efferent components of the sympathetic and parasympathetic nervous systems to the heart rate (HR) response to dynamic physical exercise was evaluated in 23 normal males. 2. The...
Clin Sci (Lond) (1986) 71 (2): 199-204.
Published: 01 August 1986
...S. M. Walker; R. F. Bing; J. D. Swales; H. Thurston 1. Plasma noradrenaline (NA), blood pressure (BP) and heart rate (HR) were measured simultaneously in conscious rats under basal conditions in the early phase (4–6 weeks) of one-kidney, one-clip hypertension (1K1C), in the early (4–6 weeks) and...
Clin Sci (Lond) (1986) 70 (4): 347-352.
Published: 01 April 1986
... asthma blood pressure glucose heart rate noradrenaline potassium Clinical Science (1986) 70, 341-352 347 Effect of low dose adrenaline and noradrenaline infusions on airway calibre in asthmatic patients K . E. B E R K I N , G . C. INGLIS, S . G . B A L L A N D N . C. T H O M S O N Department of...
Clin Sci (Lond) (1985) 69 (5): 533-540.
Published: 01 November 1985
... tests is largely based on the magnitude of the elicited haemodynamic responses, their reproducibility in any given subject is critical. 2. In 39 subjects with continuous blood pressure (intra-arterial catheter) and heart rate monitoring we measured (i) the blood pressure and heart rate rises during hand...
Clin Sci (Lond) (1985) 69 (4): 483-492.
Published: 01 October 1985
...G. Eisenhofer; D. G. Lambie; R. H. Johnson 1. Twenty-five normotensive men were subjected to two periods of mental stress involving a cognitive task and a competitive electronic game. Plasma catecholamines, heart rate and blood pressure were measured before and during mental stress. Responsiveness...
Clin Sci (Lond) (1985) 69 (2): 215-222.
Published: 01 August 1985
... of NaCl/1) plus ascorbic acid, 1 mg/ml (control), over 30 min. 2. Venous adrenaline concentrations of 2.19 ± 0.15 nmol/l, 0.73 ± 0.08 nmol/l and 0.15 ± 0.03 nmol/l were achieved during the high A, low A and control infusions respectively. 3. Heart rate rose significantly by 19 ± 3 beats/min (high A...
Clin Sci (Lond) (1985) 68 (2): 185-191.
Published: 01 February 1985
...Margareta Bramnert; Hökfelt Bernt 1. There is evidence that opioid peptides influence blood pressure and heart rate in animals and man. In the present investigation the effect of naloxone on the exercise-induced increase in blood pressure, heart rate, plasma catecholamines, plasma renin activity...
Clin Sci (Lond) (1985) 68 (1): 49-56.
Published: 01 January 1985
...B. C. Campbell; Alessandra Sturani; J. L. Reid 1. Captopril (50 mg orally) produced a significant fall in systolic and diastolic blood pressure in six normotensive sodium replete subjects, without a rise in heart rate. 2. On captopril, there was no change in the expected normal increase in heart...
Clin Sci (Lond) (1984) 67 (3): 321-327.
Published: 01 September 1984
... standing, to the reflex fall of blood pressure. 16 12 1983 15 3 1984 © 1984 The Biochemical Society and the Medical Research Society 1984 arterial pressure baroreceptor reflexes catecholamines head-up tilt heart rate posture rest standing supine Clinical Science (1984) 67...