This review describes adverse outcomes in pregnancy after brief, intermittent, or permanent residence at high altitudes. Review of literature shows that congenital malformations rates are higher at high altitudes. Additionally, rates of stillbirths, small size for gestational age, and preeclampsia are increased in populations living at high altitudes and are associated with high maternal hemogl...

yarrow (achillea spp.) belonging to the family of asteraceae with useful properties, such as anti-diaphoretic, anti-hemorrhagic, anti-inflammation, anti-biotic, anti-fungal, anti-bacterial, carminative and anti-oxidant effects. the present investigation assessed the morphological diversity of achillea aucheri, which is indigenous plant from damavand mountain of iran. the samples were collected ...

TO THE EDITOR: I read with great interest the recent article by Martinot et al. (4). One aspect of high-altitude exposure that is often overlooked is high-altitude-related ophthalmic changes. For instance, high-altitude exposure may result in “central retinal vein occlusion.” Symptoms consistent with occlusion may appear as early as 2 days after entering higher altitudes (2). On the other hand,...

There have been 10 specific "wheel-well" passenger stowaway flights (the wheel-well area was entered just before take-off) documented in the N.Y. Times between 1947-1993. Five stowaways survived flights encompassing altitudes as high as 39,000 feet, with six dying in the process (one flight had two stowaways, one fatal, one surviving). Three Douglas DC-8 and four Boeing 707 aircraft, plus a Car...

Hyperventilation is one of the most important features of acclimatization to high altitude. Resting ventilation at extreme altitudes increases up to fourfold and exercise ventilation for a given work level increases to the same extent. Hypoxic stimulation of the peripheral chemoreceptors is the chief mechanism for the hyperventilation but there is also evidence that central sensitization of the...

Electrocardiograims of healthy men both native and long-term residents at 14,900 feet above sea level have been obtained and classified according to their dominant pattern. Most of the tracings showed signs of either right ventricular hypertrophy or right bundle-branch block, incomplete and complete. Some of the mechanisms responsible for these electrocardiographic changes found at high altitud...

I have been asked to speak on the Neuro-physiologicai changes produe as a result of stay at high altitudes. We have 110t done any work on thisan' unfortunately, there have not been many other studies reported on this. I w' therefore, present before you today whatever little is available in the publish literature; Mostly, workers carrying out physiological studies at high altitudes ha made certa...

The present work has explored for the first time acclimation of upper versus lower canopy leaves along an altitudinal gradient. We tested the hypothesis that restrictive climatic conditions associated with high altitudes reduce within-canopy variations of leaf traits. The investigated beech (Fagus sylvatica L.) forest is located on the southern slope of the Hrubý Jeseník Mountains (Czech Republ...