Reduced cardiac vagal control reflected in low heart rate variability (HRV) is associated with greater risks for cardiac morbidity and mortality. In two-stage meta-analyses of genome-wide association studies for three HRV traits in up to 53,174 individuals of European ancestry, we detect 17 genome-wide significant SNPs in eight loci. HRV SNPs tag non-synonymous SNPs (in NDUFA11 and KIAA1755), e...

Background: It is well documented that stress poses a serious challenge to students’ health in medical school. The Perceived Stress Scale (PSS) the most widely used psychological instrument for measuring perception of stress. Heart rate variability (HRV) may provide an objective measure physiologic index students. This study investigated impact one semester school on HRV and PSS first-year

BACKGROUND We determined the extent to which heart rate variability (HRV) responses to daily physical activity differ between subjects with and without chronic neck pain. METHOD Twenty-nine subjects (13 women) with chronic neck pain and 27 age- and gender-matched healthy controls participated. Physical activity (accelerometry), HRV (heart rate monitor), and spatial location (Global Positionin...

Heart rate variability (HRV) is the temporal variation between sequences of consecutive heartbeats. On a standard electrocardiogram (ECG), the duration between two adjacent R wave peaks is termed the R-R interval. The resulting period between adjacent QRS complexes resulting from sinus node depolarization is termed the N-N (normal-normal) interval, and HRV is the measurement of the variability ...

Heart rate variability (HRV), the quantification of beat-to-beat variability, has been studied as a potential prognostic marker in inflammatory diseases such as sepsis. HRV normally reflects significant levels of variability in homeostasis, which can be lost under stress. Much effort has been placed in interpreting HRV from the perspective of quantitatively understanding how stressors alter HRV...

This study investigated the fluctuations of autonomic nervous activities during the menstrual cycle. Twenty college females were tested for cardiovascular reactivity to mental challenge during both follicular and luteal phases across two menstrual cycles. Power spectral analysis of heart rate variability (HRV) was used to examine the autonomic nervous activities. At baseline, although heart rat...

Personality and heart rate variability (HRV) each are strong predictors of well-being, particularly cardiac health and longevity. The present study compares the changes in HRV during resting state in the Type ̳A‘ and Type ̳B‘ personalities. The personality of subjects is chosen according to Glazer questionnaire. In each of these two groups 30 males were taken. After general interview of these s...

To clarify the role of autonomic nervous functions in cardiovascular adaptation to microgravity, heart rate variability (HRV) and blood pressure variability (BPV) were evaluated during thermoneutral head-out water immersion (HOI) of eight healthy young subjects 23 to 31 yr of age. The very low-frequency (VLF; 0.00-0.04 Hz) component of BPV tended to increase during HOI, whereas the low-frequenc...

The aim of the present research was to analyze autonomic stress response nursing students in a Objective Structured Clinical Evaluation (OSCE). We analyzed, 41 s-year degree (20.1 ± 2.3 years), modifications heart rate variability (HRV) monitor before, during and after 18 different scenarios complete OSCE. Heart mean nurse consistent with an anticipatory anxiety at beginning OSCE, showing sympa...