Heart rate variability indices for very short-term (30 beat) analysis. Part 1: survey and toolbox

摘要: Heart rate variability (HRV) analysis over very short (<60 s) periods may be useful for monitoring dynamic changes in autonomic nervous system activity where steady-state conditions are not maintained (e.g. during drug administration, or the start end of exercise). From 1980s there has been a wealth HRV indices produced quest better measures change parasympathetic and sympathetic activity. Many have sparingly used investigated application to short-term use. This study surveyed published methods searching that could applied time analysis. The survey included domain, frequency respiratory sinus arrhythmia, Poincare plot, heart characteristics. Indices were tested with segments archived data remove those invalid results, mathematically equivalent to, but less well known than other indices. identified comprehensive list 115 subsequently coded screened. Of these, 70 unique finite number 60 s data, so Toolbox. These require validation against physiological before they can cardiac