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Effect of long term high altitude exposure on cardiovascular autonomic adjustment during rest and post-exercise recovery

Overview of attention for article published in Annals of Occupational and Environmental Medicine, May 2018
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Title
Effect of long term high altitude exposure on cardiovascular autonomic adjustment during rest and post-exercise recovery
Published in
Annals of Occupational and Environmental Medicine, May 2018
DOI 10.1186/s40557-018-0240-1
Pubmed ID
Authors

Prem Bhattarai, Bishnu H. Paudel, Dilip Thakur, Balkrishna Bhattarai, Bijay Subedi, Rita Khadka

Abstract

Despite the successful adaptation to high altitude, some differences do occur due to long term exposure to the hypoxic environment. The effect of long term high altitude exposure on cardiac autonomic adjustment during basal and post-exercise recovery is less known. Thus we aimed to study the differences in basal cardiac autonomic adjustment and its response to exercise in highlanders and to compare it with lowlanders. The study was conducted on 29 healthy highlander males who were born and brought up at altitude of 3000 m and above from the sea level, their cardiac autonomic adjustment was compared with age, sex, physical activity and ethnicity-matched 29 healthy lowlanders using Heart Rate Variability (HRV) during rest and recovery from sub-maximal exercise (3 m step test). Intergroup comparison between the highlanders and lowlanders and intragroup comparison between the rest and the postexercise recovery conditions were done. Resting heart rate and HRV during rest was comparable between the groups. However, heart rate recovery after 3 min step test was faster in highlanders (p < 0.05) along with significantly higher LF power and total power during the recovery phase. Intragroup comparison of highlanders showed higher SDNN (p < 0.05) and lower LF/HF ratio (p < 0.05) during recovery phase compared to rest which was not significantly different in two phases in lowlanders. Further highlander showed complete recovery of RMSSD, NN50, pNN50 and HF power back to resting level within five minutes, whereas, these parameters failed to return back to resting level in lowlanders within the same time frame. Highlanders completely recovered back to their resting state within five minutes from cessation of step test with parasympathetic reactivation; however, recovery in lowlanders was delayed.

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Geographical breakdown

Country Count As %
Unknown 30 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 5 17%
Student > Ph. D. Student 4 13%
Student > Master 3 10%
Other 2 7%
Professor 2 7%
Other 4 13%
Unknown 10 33%
Readers by discipline Count As %
Sports and Recreations 9 30%
Medicine and Dentistry 3 10%
Nursing and Health Professions 2 7%
Neuroscience 2 7%
Business, Management and Accounting 1 3%
Other 4 13%
Unknown 9 30%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 09 July 2018.
All research outputs
#20,663,600
of 25,382,440 outputs
Outputs from Annals of Occupational and Environmental Medicine
#141
of 197 outputs
Outputs of similar age
#264,750
of 339,382 outputs
Outputs of similar age from Annals of Occupational and Environmental Medicine
#7
of 9 outputs
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So far Altmetric has tracked 197 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 8.5. This one is in the 19th percentile – i.e., 19% of its peers scored the same or lower than it.
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