Cerebral blood flow in acute mountain sickness
- Univ. of Birmingham (England)
Changes in cerebral blood flow (CBF) were measured using the radioactive xenon technique and were related to the development of acute mountain sickness (AMS). In 12 subjects, ascending from 150 to 3,475 m, CBF was 24% increased at 24 h (45.1 to 55.9 initial slope index (ISI) units) and 4% increased at 6 days (47.1 ISI units). Four subjects had similar increases of CBF when ascending to 3,200 m 3 mo later, indicating the reproducibility of the measurements. In nine subjects, ascending from 3,200 to 4,785-5,430 m, CBF increased to 76.4 ISI units, 53% above estimated sea-level values. CBF and increases in CBF were similar in subjects with or without AMS. In six subjects, CBF was measured before and after therapeutic intervention. At 2 h CBF increased 22% (71.3 to 87.3 ISI units) above pretreatment values in three subjects given 1.5 g acetazolamide, while three subjects given placebo showed no change. Symptoms remained unaltered in all subjects during the 2 h of the study. Overall, the results indicated that increases in CBF were similar in subjects with or without AMS while acetazolamide-provoked increases of CBF in AMS subjects caused no acute change in symptoms. Alterations in CBF cannot be directly implicated in the pathogenesis of AMS.
- OSTI ID:
- 6070052
- Journal Information:
- Journal of Applied Physiology (1985); (USA), Vol. 69:2; ISSN 8750-7587
- Country of Publication:
- United States
- Language:
- English
Similar Records
Efficacy of Synbiotics to Reduce Acute Radiation Proctitis Symptoms and Improve Quality of Life: A Randomized, Double-Blind, Placebo-Controlled Pilot Trial
Effect of Recombinant Human Deoxyribonuclease on Oropharyngeal Secretions in Patients With Head-and-Neck Cancers Treated With Radiochemotherapy
Related Subjects
59 BASIC BIOLOGICAL SCIENCES
CEREBRAL CORTEX
BLOOD FLOW
VASCULAR DISEASES
DIAGNOSIS
ALTITUDE
XENON ISOTOPES
BODY
BRAIN
CENTRAL NERVOUS SYSTEM
CEREBRUM
DISEASES
ISOTOPES
NERVOUS SYSTEM
ORGANS
550601* - Medicine- Unsealed Radionuclides in Diagnostics
550901 - Pathology- Tracer Techniques