F. Bonde-Petersen

Cardiovascular response to lower body negative pressure before and after 20 days horizontal bed rest.

Katsu Takenaka, Yasuko Suzuki, Keishi Kawakubo, Y Haruna et autres

To evaluate the effects of 20 days bed rest (BR) on cardiovascular system in normal subjects, left ventricular (LV) echocardiography and vascular ultrasound of the common carotid artery and abdominal aorta were performed during rest and a supine lower body negative pressure …

jp (code pays fourni par la source)

Effects of the renin-angiotensin-aldosterone system on the cardiovascular system during 20-days bed rest.

Y Haruna, F. Bonde-Petersen, Katsu Takenaka, Yutaka Suzuki et autres

Long term change of renin-angiotensin-aldosterone system (RAAS) induced by bed rest and its effects on cardiovascular system are still controversial. The purpose of this study was to obtain a general conclusion on these questions by analyzing our two 20-days horizontal bed rest …

jp (code pays fourni par la source)

Beta-blockade does not improve orthostatic intolerance induced by 20 days bed rest.

Katsu Takenaka, Yasuko Suzuki, Keishi Kawakubo, Y Haruna et autres

To assess if propranolol influences orthostatic intolerance induced by prolonged bed rest (BR), a lower body negative pressure test (LBNP) and left ventricular (LV) echocardiography before and during -40mmHg of LBNP were performed with and without intravenous propranolol administration (0.04mg/kg) in 9 …

jp (code pays fourni par la source)

Muscle Morphological Characteristics with Disuse: Bed Rest &SPACEFLIGHTS

F. Bonde-Petersen, Jesper L. Andersen, Bengt Saltin

Capillary filtration rate, venous compliance, and blood flow in arms and legs do not change during bed rest for 20 days.

F. Bonde-Petersen, Yoichi Suzuki, Keishi Kawakubo, A Gunji

It has been generally accepted that pooling of the blood in the legs is one reason for the orthostatic intolerance experienced after space flights. This is also the reasoning behind the application of anti-G suits during reentry after space flights. Fighter pilots …

de (code pays fourni par la source)

Effects of mild supine exercise during 20 days bed rest on maximal oxygen uptake rate in young humans.

H. Kashihara, Y Haruna, Yuta Suzuki, Kiyoshi Kawakubo et autres

Fourteen sedentary young volunteers performed a maximal exercise test on a bicycle ergometer before, after and eight or nine weeks after 20 days bed rest. They were divided into four groups. They all went through 20 days bed rest; 5 females and …

jp (code pays fourni par la source)

Cardiovascular effects of 20 days bed rest in healthy young subjects.

Katsu Takenaka, Yoshinori Suzuki, Keishi Kawakubo, Y Haruna et autres

To evaluate the effects of inactivity on the cardiovascular system in normal subjects, left ventricular echocardiography and vascular ultrasound of the common carotid artery, abdominal aorta and femoral artery, and lower body negative pressure tests were performed in 14 healthy volunteers (mean …

jp (code pays fourni par la source)

Effect of 20 days bed rest upon peripheral capillary filtration rate, venous compliance and blood flow in arms and legs.

F. Bonde-Petersen, Yasuko Suzuki, Keishi Kawakubo, Atsuko Gunji

Capillary filtration rate, venous compliance and blood flow in arms and legs were measured during bed rest by strain gauge plethysmography using a liquid metal alloy in silastic tubes. Furthermore orthostatic tolerance to lower body suction was recorded. Six young healthy males …

de (code pays fourni par la source)

Health care during prolonged weightlessness in humans.

F. Bonde-Petersen

The demands for accumulation of knowledge about the human adaptation to weightlessness of long duration and the implications for the health and well-being of the astronaut have become increasingly important also for the international space programmes which are under development. The health …

de (code pays fourni par la source)

Peripheral and central blood flow in man during cold, thermoneutral, and hot water immersion.

F. Bonde-Petersen, L Schultz-Pedersen, Nils Dragsted

Cardiovascular reflexes were studied during immersion in water to the chest. Cardiac output (CO) was determined by acetylene rebreathing; forearm muscle and subcutaneous blood flow by 133Xe-clearance; and cutaneous blood flow by laser Doppler. Measurements were taken in a) control situation (CTR) …

dk (code pays fourni par la source)

Catecholamines, circulation, and the kidney during water immersion in humans

Peter Norsk, F. Bonde-Petersen, N. J. Christensen

Because results in literature are discrepant with regard to the effects of water immersion (WI) on the release of norepinephrine (NE) in humans, the following study was performed. Simultaneous measurements of plasma NE, central cardiovascular variables, and renal sodium excretion were conducted …

dk (code pays fourni par la source)

Influence of the renin-angiotensin system on human forearm blood flow

Carsten Stadeager, B Hesse, Otto Mølby Henriksen, F. Bonde-Petersen et autres

Although angiotensin II is a potent vasoconstrictor agent in all tissues, including the human forearm, equivocal effects on forearm blood flow (FBF) have been found after angiotensin blockade. In 13 healthy Na(+)-depleted subjects FBF was measured by the 133Xe washout technique; subcutaneous …

dk (code pays fourni par la source)