High-altitude walking with YACs

High resolution restriction mapping of YACs using chromosome fragmentation.

The large insert size of yeast artificial chromosomes (YACs; 1) has made them ideal for the analysis of complex genomes. YACs can be restriction mapped with rare cutting enzymes but this does not provide the resolution required to investigate gene structure (such as locating exons and introns). Detailed mapping normally requires sub-cloning into cosmid or phage vectors. Here we describe a metho...

Cerebral Venous Sinus Thrombosis Masquerading as High Altitude Cerebral Edema at Extreme Altitude

Introduction: Extreme altitude travel has gained popularity globally for adventurous, scientific, and military endeavors. Cerebral venous sinus thrombosis (CVST) at extreme altitude is a rare, covert, and emergent condition requiring immediate intervention. Case Presentation: A case of CVST masqueraded as high altitude cerebral edema (HACE) at 6700 m/22000 ft i...

High-altitude corneal oedema associated with acetazolamide.

Walking economy at simulated high altitude in human healthy young male lowlanders

We measured oxygen consumption during walking per unit distance (Cw) values for 12 human healthy young males at six speeds from 0.667 to 1.639 m s-1 (four min per stage) on a level gradient under normobaric normoxia, moderate hypoxia (15% O2), and severe hypoxia (11% O2). Muscle deoxygenation (HHb) was measured at the vastus lateralis muscle using near-infrared spectroscopy. Economical speed wh...

Ocular Problems in High-Altitude Traveling: A Review With Focus on Management

Traveling to high altitudes can expose the eye to reduced ambient cold and low-pressure environments. These conditions can affect the physiology of the eye and may result in ocular problems and visual disturbances. In this paper, ocular disorders related to high altitudes are briefly reviewed. Then, high-altitude ocular disorders are categorized in three parts: those related to dry and cold env...