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- physionet.org), an NIH-funded resource that makes physiologic time series and related open-source software freely vailable to researchers) provided 15 time series, obtained from healthy subjects and from two groups of patients with heart disease, of time intervals between consecutive heart beats. Each series is about 24 hours long (roughly 100,000 intervals).
Since inter-subject variability confounds comparisons of techniques for analysing cardiac rhythms, the US FDA and its counterparts around the world require the use of standard data sets for such comparisons. Several of the articles in this issue present analyses of the standard data sets provided by PhysioNet, which remain available at: physionet.org/challenge/chaos.
">Volume 19, Issue 2
