...Philip L. Mar; Cyndya A. Shibao; Emily M. Garland; Bonnie K. Black; Italo Biaggioni; André Diedrich; Sachin Y. Paranjape; David Robertson; Satish R. Raj Patients with neurogenic orthostatic hypotension (OH) typically have impaired sympathetic nervous system tone and therefore low levels of upright...

...W. Wieling; J. J. Van Lieshout; A. D. J. Ten Harkel 1. The initial circulatory adjustments induced by head-up tilt and tilt-back were investigated in six healthy subjects (aged 30–58 years) and six patients with orthostatic hypotension due to pure autonomic failure (aged 33–65 years). 2. Continuous...

... pressure (six out of eight) and venous constrictive responses (seven out of eight patients) to noradrenaline, consistent with impaired arteriolar and venous innervation. 3. In contrast, the patients with hyperadrenergic orthostatic hypotension ( n =16) and orthostatic tachycardia ( n = 16) showed diastolic...

... to the laboratory for orthostatic stress testing on account of attacks of syncope for which no cause had been Key words: blood volume, carotid baroreceptors, orthostatic hypotension, plasma volume. Correspondence: Professor R. Hainsworth, Institute of Cardiovascular Research, University of Leeds, Leeds, U.K. H. El...

...A. D. J. Ten Harkel; J. J. Van Lieshout; W. Wieling 1. The effects of leg muscle pumping (tiptoeing) and tensing (leg-crossing) on orthostatic blood pressure were investigated in six healthy adult subjects (aged 28–34 years) and in seven patients with severe hypoadrenergic orthostatic hypotension...

... in blood pressure. © 1992 The Biochemical Society and the Medical Research Society 1992 ageing cardiac output heart rate non-invasive continuous blood pressure orthostatic hypotension postural changes stroke volume total peripheral resistance 3 2 1992 10 3 1992 Clinical...

...A. L. Tonkin; L. M. H. Wing; M. J. Morris; V. Kapoor 1. To test the hypothesis that in apparently healthy elderly subjects with orthostatic hypotension there is afferent baroreflex dysfunction, cardiovascular and neurohumoral responses were measured after separate stimuli which activated...

... and fainting appear to be common in both. Key words: continuous blood pressure determination, heart rate, orthostatic hypotension, postural changes, 10- 14-year-old children. Abbreviations: BP, blood pressure; HR, heart rate; AHRmax. and AHRmin., initial peak heart rate increase and subsequent relative minimum...

... 1990 ageing blood pressure determination orthostatic hypotension postural changes Clinical Science (1990) 79.73-79 73 Orthostatic circulatory control in the elderly evaluated by non-invasive continuous blood pressure measurement B. P. M. IMHOLZ', J. H. A. DAMBRINKI, J. M. KAREMAKER* AND W. W...

...Lewis A. Lipsitz; Helene A. Storch; Kenneth L. Minaker; John W. Rowe 1. Orthostatic hypotension, an age-related phenomenon, has been associated with hypertension and body weight variability. To evaluate the relative contributions of blood pressure elevation and abnormalities in extracellular volume...

...G. Eisenhofer; E. A. Whiteside; R. H. Johnson 1. Plasma catecholamine, blood pressure and heart rate responses to standing were measured in ten alcoholics during withdrawal, ten alcoholics after 2–7 weeks of abstinence from alcohol, six abstinent alcoholics with orthostatic hypotension and ten...

... mmHg in systolic blood pressure on standing; subjects in the orthostatic hypotension group had falls of more than 20 mmHg systolic and 10 mmHg diastolic blood pressure on standing. 2. The heart pressure response on standing showed no significant difference between the two groups. 3. The orthostatic...

...A. J. Man In 'T Veld; H. H. Vincent; M. A. D. H. Schalekamp 1. Three patients with orthostatic hypotension due to peripheral autonomic neuropathy were studied. The diagnosis was based on severe hypotension during 60° head-up tilting and absence of the systolic pressure overshoot in phase IV...

...N. J. White 1. The heart-rate changes on standing were studied in 16 elderly patients with idiopathic orthostatic hypotension and compared with those of 20 controls. The mean age of both groups was 78 years, and all were in sinus rhythm. 2. The patients with orthostatic hypotension differed from...