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Effects of the cold face test on heart rate variability in students
Author(s) -
Saperova Elena,
Dimitriev Dmitry,
Filippova Irina
Publication year - 2021
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.2021.35.s1.03950
Subject(s) - supine position , heart rate variability , cold pressor test , morning , medicine , heart rate , cardiology , anesthesia , blood pressure
The purpose of this study was to determine the effects of the cold pressor test on heart rate variability in students. Sixty five students with a mean age of 20.61±0.13 years take part in the study (86% women, 14% men). They were studied in the morning hours in a quiet room at a comfortable temperature. Time domain (SDNN, RMSSD, pNN50), frequency domain (TP, HF, VLF, LF and LF/HF ratio) and nonlinear (SD1, SD2, ApEn, SampEn, D2, DFA1, DFA2) parameters of HRV were obtained from all participants for 5 minutes before and 5 minutes during cold face test (0–1 °C cold compresses) in a supine position. Statistical analysis was performed using Mann‐Whitney test. Heart rate during cold face test was significantly lower than that during rest period (74.03±1.26 vs 76.74±1.21 beat/min, p=0.006). Time domain parameters were found to be higher during cold face test than that during rest (SDNN: 52.6±2.85 vs 43,61±2,23 ms, p=0.006; RMSSD: 59.87±4.08 vs 44.99±2.93 ms, p=0.001 and pNN50: 30.49±2.38 vs 22.07±2.13 %, p=0.003). There was no differences during cold face test period and rest period in TP (2517.24±301.8 vs 2097.89±249.98 ms 2 , p=0.456; VLF: 92.44±12.21 vs 83.59±9.99 ms 2 , p=0.452; LF: 1024.98±132.06 vs 932.86±107.70 ms 2 , p=0.896. High frequency parameter was significantly higher during cold face test than that during rest (1395.36±184.39 vs 1078.11±143.13 ms 2 , p=0.013). Nonlinear measures were significantly higher during cold face test than that during rest (SD1: 42.39±2.89 vs 31.83±2.07 ms, p=0.001; SD2: 60.52±3.04 vs 52.45±2.50 ms, p=0.025). ApEn and D1 were significantly lower during cold face test than that during rest (respectively, 1.15±0.01 vs 1.40±0.01 and 0.87±0.03 vs 1.01±0.02, p<0.001). The other HRV parameters including D2, LF/HF ratio, pLF, pHF, SampEn, DFA2 were not significantly different. These results suggest that cold face test has been associated with increased vagal cardiac control and decrease entropy and D1.