Twenty-four hours’ holter changes in short-term port crew during oceangoing voyage
ZHANG Yongsheng
CHU Liyun
WANG Yan
GONG Tign
LIU Ha iying
Abstract：Objective To observe the effects of short periods of making berth on 24 h holter changes of the crew during oceangoing voyage.Methods For 30 cases of short-term port crew, sinus rhythm, premature beat, ST segment, QT dispersion and time domain,frequency domain and nonlinear index changes of heart rate variability were analyzed.Results Compared with out operating environ-ment, the average heart rate and the lowest heart beat decreased, the highest heart beat increased, the sinus node dysfunction improved, premature contraction were less frequent, the depressed ST segment elevated, the standard deviation of normal-to-normal intervals ( SDNN) , standard deviation of the average NN in all 5 min of the entire recording ( SDANN) , SDNN index, root mean square of successive differences (RMSSD), number of pairs of adjacent normal-to-normal intervals by more than50 ms (NN50), percent of NN50 (PNN50), triangular index, very low frequency (VLF), very high frequency ( VHF) , vector angle index ( VAI) and vector length index ( VLI) increased. Conclusion Changing of operating environment can promote the recovery of autonomic nervous system.
Keywords：VoyageOperating environmentHolterAutonomic nervous system
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 273-275 )