Simulated High Altitude Helium-Oxygen Diving.

Background: Experience with commercial heliox diving at high altitude is limited. The purpose of this study was to evaluate the effects of acute high-altitude exposure on fitness to dive and the safety of decompression after heliox diving while using U.S.

The true distal posterior inferior cerebellar artery aneurysm: clinical characteristics and strategy for treatment.

Objective: A series of aneurysms located at the 4 (th) or 5 (th) segment of the posterior inferior cerebellar artery (PICA) has not been previously reported in the literature. We report six such cases and analyze their clinical characteristics and outcomes from three different treatment strategies.

Material And Methods: We reviewed six patients with a diagnosis of distal PICA aneurysm.