During continued exposure to hypobaric hypoxia in acclimatizing lowlanders increasing
norepinephrine levels indirectly indicate sympathoexcitation, and in a few subjects serial …

Combined results from different independent studies suggest that acclimatization to high
altitude induces a slowly developing sympathetic activation, even at levels of hypoxia that …

New Findings What is the central question of this study? High‐altitude hypoxia increases
muscle sympathetic nerve activity (MSNA), but whether intravenous infusion of dopamine, to …

Acute exposure to hypoxia causes chemoreflex activation of the sympathetic nervous
system. During acclimatization to high altitude hypoxia, arterial oxygen content recovers, but …

It is well established that after acclimatization at high altitude, many sympathetic pathways
are hyperactive yet heart rate (HR) remains unchanged. In this study, we attempted to …

Several studies have shown increased sympathetic activity during acute exposure to
hypobaric hypoxia. In a recent field study we found reduced plasma catecholamines during …

This investigation examined the relationship between alterations in plasma norepinephrine
associated with 21 days of high-altitude exposure and muscle sympathetic activity both at …

Sympathoexcitation is a hallmark of hypoxic exposure, occurring acutely, as well as
persisting in acclimatised lowland populations and with generational exposure in highland …

Although it has been shown that muscle sympathetic nerve activity increases during high
altitude exposure, mechanisms of sympathoexcitation and blood pressure control after …

The sympathoadrenal system plays a major role in adjustments to both short-and long-term
high-altitude exposure. Thus, this study investigated catecholamine responses in blood …