Time- and frequency-domain parameters of heart rate variability and sympathetic skin response in Parkinson's disease.

The autonomic nervous system (ANS) is regularly affected in Parkinson's disease (PD). Information on autonomic dysfunction can be derived from e.g.

Greater cardiovascular reactivity to a cold stimulus is due to higher cold pain perception in black Africans: the Sympathetic Activity and Ambulatory Blood Pressure in Africans (SABPA) study.

Objective: To evaluate the role of pain perception and pain stimulus components for blood pressure responses to stress in the black and the white African population with hypertension.

Basic Methods: Cardiovascular regulation in response to a cold pressor stimulus was studied in hypertensive black (n = 110) and white (n = 95) Africans. Perception of stressfulness of the task was assessed on a seven-point Likert scale.

Genotoxic effects of radiofrequency electromagnetic fields.

101 publications are exploited which have studied genotoxicity of radiofrequency electromagnetic fields (RF-EMF) in vivo and in vitro. Of these 49 report a genotoxic effect and 42 do not. In addition, 8 studies failed to detect an influence on the genetic material, but showed that RF-EMF enhanced the genotoxic action of other chemical or physical agents.

Influence of ECG sampling frequency on spectral analysis of RR intervals and baroreflex sensitivity using the EUROBAVAR data set.

To evaluate the impact of different ECG sampling frequencies on parameters of spectral and baroreflex analysis. Spectral and baroreflex analyses were performed in the EUROBAVAR data set (46 recordings of 23 persons) using the original ECG sampling frequency of 500 Hz and - simulated - sampling frequencies of 200 and 100 Hz. For this analysis, the technique of trigonometric regressive spectral (TRS) analysis was used.

Acute autonomic effects of vitamins and fats in male smokers.

Background/objectives: Vitamins can help improve cardiovascular control. In contrast, smoking works in the opposite fashion, reducing the baroreflex control of heart rate (HR) possibly via oxidative stress. High-fat challenges also impair cardiovascular regulation.