35 Heart Rate Variability

Determinants of a Reduced Heart Rate Variability in Chronic Atrial Fibrillation

“…HRVF was not found to differ between women and men with AF. The possible explanation might relate to the age of patients with AF, most of them being older than 60 years, as it is suggested that the gender‐related differences disappear in older subjects, 9 however conflicting data exist 6 …”

“…Therefore, effects of factors not specifically examined in this study might warrant clarification in further investigations. However, as reviewed by Sosnowski, 6 numerous modifiable factors influence HRV in a negligible manner if considered in a cohort or cross‐sectional studies.…”

“…Accordingly, the presence of atrial fibrillation (AF) is listed among excluding criteria in most clinical studies. In such a way, numbers of patients with AF are rejected 6 . This is of special importance in heart failure, where the proportion of AF patients varies between 10% and 50% depending on the heart failure advance 7,8 .…”

The influence of oral water load on energy expenditure and sympatho-vagal balance in obese and normal weight women

“…Significant changes of HRV parameters, defined as at least 30% increase or decrease of the initial values of total power (TP) and SDNN [20], were observed only in a few subjects. A TP increase was found in 7 obese and 5 normal weight, and a decrease in 2 obese and 3 normal weight women.…”

“…Only 5-minute periods of uninterrupted sinus rhythm were accepted. In the final analysis averaged values of baseline HRV parameters from three consecutive 5-minute periods that did not change by more than 15% were considered as the reference [20]. …”