Deacclimation period in ventricular function after high altitude expedition.
Day-by-day changes in ventricular-ejection time/heart-rate ratio (VET/HR) and in ejection time index (ETI), determined by an impedance method in a decompression chamber, were more labile in the mountaineers who had experienced high altitude (above 6,000 m) within the past 1 year, and the ETI values in the first hypoxic exposure were significantly high in these subjects, though close to those of the non-experienced group in the later exposures, suggesting that the effect of hypoxic acclimation on cardiac function might remain at least 1 year after return to sea level.
Mori
S
S
Department of Aerospace Physiology, Nagoya University, Japan.
Watanabe
S
S
Shimaoka
K
K
Takabayashi
A
A
D000064:Acclimatization; D000328:Adult; D000531:Altitude; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D013177:Sports; D013997:Time Factors; D016276:Ventricular Function