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BACKGROUND Atrial fibrillation (AF) is the most common arrhythmia encountered in clinical practice. The natural history of AF tends to begin with short paroxysms which gradually evolve into longer episodes, frequently treatment-resistant, and finally take a permanent form. It is a polyaetiological condition and single paroxysms may be caused by a variety of(More)
Seasonal variation in the occurrence of atrial fibrillation (AF) has been documented, yet precise mechanisms and factors underlying the phenomenon remain unclear. We have previously observed the decrease in the number of AF paroxysms between May and August, when sunshine levels were highest. The objective of the present study was, in turn, to determine(More)
Supplement. The use of FT (Fourier Transformed) and AAFT (Amplitude Adjusted Fourier Transformed) surrogate data to distinguish the source of multifractality in meteorological time series The amplitude adjusted Fourier transform (AAFT) surrogate data were frequently used in literature to but also other surrogates can be applied. For example, Fourier(More)
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