Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Janice V. Meck"'
Autor:
Steven H. Platts, Richard J. Cohen, Michael B. Stenger, Janice V. Meck, Kichang Lee, Tatsuya J. Arai
Publikováno v:
Acta Astronautica. 68:770-777
Orthostatic intolerance (OI) is a significant challenge for astronauts after long-duration spaceflight. Depending on flight duration, 20–80% of astronauts suffer from post-flight OI, which is associated with reduced vascular resistance. This paper
Publikováno v:
Aviation, Space, and Environmental Medicine. 80:A01-A08
Introduction: Spaceflight has profound effects on the human body. Many of these effects can be induced with head-down bed rest, which has been a useful ground-based analog. With limited resources aboard the International Space Station for human resea
Publikováno v:
Computers in Biology and Medicine. 37:358-363
Circulatory adaptations resulting in postflight orthostasis have frequently been observed in response to space travel. It has been postulated that a decrement in left ventricular mass (LVM) found after microgravity exposure may be the central compone
Publikováno v:
American Journal of Physiology-Heart and Circulatory Physiology. 288:H839-H847
Head-down bed rest changes the values of many cardiovascular and endocrine variables and also elicits significant hypovolemia. Because previous studies had not controlled for hypovolemia, it is unknown whether the reported changes were primary effect
Autor:
Wendy W. Waters, David Robertson, Paul J. Mills, Janice V. Meck, Michael G. Ziegler, Paul L. Huang, Heidi F. DeBlock
Publikováno v:
American Journal of Physiology-Heart and Circulatory Physiology. 286:H1486-H1495
Although all astronauts experience symptoms of orthostatic intolerance after short-duration spaceflight, only ∼20% actually experience presyncope during upright posture on landing day. The presyncopal group is characterized by low vascular resistan
Publikováno v:
Journal of Cardiovascular Pharmacology. 41:126-131
Intravenous injections of the indirect sympathetic amine, tyramine, are used as a test of peripheral adrenergic function. The authors measured the time course of increases in ejection fraction, heart rate, systolic and diastolic pressure, popliteal a
Publikováno v:
Journal of Cardiovascular Pharmacology. 41:31-39
Insomnia is a common symptom, not only in the adult population but also in many astronauts. Hypnotics, such as temazepam (a benzodiazepine) and zolpidem (an imidazopyridine), are often taken to relieve insomnia. Temazepam has been shown clinically to
Publikováno v:
Psychosomatic Medicine. 63:886-890
OBJECTIVE: The objective of this study was to determine the effects of spaceflight duration on immune cells and their relationship to catecholamine levels. METHODS: Eleven astronauts who flew aboard five different US Space Shuttle flights ranging in
Publikováno v:
Psychosomatic Medicine. 63:865-873
OBJECTIVE: The incidence of postflight orthostatic intolerance after short-duration spaceflight is about 20%. However, the incidence after long-duration spaceflight was unknown. The purpose of this study was to test the hypothesis that orthostatic in
Publikováno v:
The American Journal of Cardiology. 95:1128-1130
Decrements in left ventricular (LV) mass observed after microgravity exposure have been previously postulated to be a central component of spaceflight-induced cardiovascular deconditioning. In this study, echocardiographic measurements of LV mass in