Dataset E: subjects who were randomly assigned to receive Encainide
Baseline (no medication)
Same subject with Encainide
There are 286 subjects in dataset E, which are numbered from e001 to e286.
Almost all subjects have two RR-interval records, eNNNa and eNNNb;
where NNN is the subject number. eNNNa refers to the "baseline"
recording that is without medication, and eNNNb refers to
the "suppression" recording that is with medication of Encainide.