Assessment of cardiovascular reactivity by fractal and recurrence quantification analysis of heart rate and pulse transit time

Malfunctioning of the autonomic nervous system in patients with chronic fatigue syndrome: a systematic literature review

“…These findings were further confirmed by the same researchers . They investigated whether the ‘Fractal & Recurrence Analysis –based Scores’ can be used to recognise phenotypes of diseases, in this case cardiovascular reactivity.…”

“…All studies, except that of the Naschitz et al . in 2003 , had a higher specificity. The more the likelihood scores approaches 1, the less false‐negative and false‐positive results were observed.…”

“…The paper published in 2003 used the Fractal and Recurrence Analysis‐based scores to compare persons with hypertension with controls and patients with CFS. Using univariate analysis, 13 variables showed significant differences between patients with CFS and controls.…”

Hyperventilation and amplified blood pressure response: is there a link?

“…15 The same protocol was applied in research for the study of disease-specific cardiovascular reactivity patterns in normotensive as well as hypertensive subjects. 34,35 The normal homeostatic response to postural challenge consists in a decrease in SBP by an average of 6.5 mmHg (range À19 to 11 mmHg) and increase in DBP by an average of 5.6 mmHg (range À9 to 22 mmHg). 1 An exaggerated increase in BP during postural challenge has been called PHT: however, there are no accepted criteria to establish a diagnosis of PHT.…”

“…First, our selection included patients with a tendency to HV 14,20,39 and with often an abnormal cardiovascular reactivity. 34,35 There was also a female gender bias. Therefore, observations of this study cannot be extrapolated to hypertensive patients or patients with anxiety.…”