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Neurocardiogenic Syncope (NCS) is a temporary loss of consciousness due to a global cerebral hypoperfusion caused by bradycardia and/or significant hypotension. We analyzed the heart rate variability (HRV) of three groups during the Tilt-test, in the supine and standing position, before hypotension. The groups are: 1) 17 healthy individuals, 2) 18 patients with complaint of NCS, but a negative Tilt-test...
There are many different tools and parameter that can be used to analyze RR time series, as the Correlation Dimension, the Lyapunov Exponents, the Higher Reconstruction Step. Here we address the problem of discriminating between two populations: one with some cardiac disease and another with healthy people, in a no invasive way, through RR time series. The mathematical tool used to analyze the series...
Multifractal analysis of heart rate variability (HRV) has been used to discriminate healthy subjects from patients with severe health conditions. We analyzed the fractal structures of the ECG recording of 11 patients who suffered acute myocardial infarction in order to identify those with impaired Left Ventricular Ejection Fraction (LVEF). Was estimated the multifractal spectrum in Matlab code from...
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