{
  "annotation_id": "aa4e84ff-fe8b-447b-a17b-105faf392cc8",
  "date_created": "2026-03-02T18:01:14.571000Z",
  "date_modified": "2026-03-02T18:01:14.571000Z",
  "file_hash": "9bdca21af1c29b5ca2ea95d16c2b36fc7cf30c4932ab6ab40f3074047e821390",
  "private": false,
  "record": {
    "abstract": "We measure the content of random uncorrelated noise in heart rate variability\nusing a general method of noise level estimation using a coarse grained\nentropy. We show that usually - except for atrial fibrillation - the level of\nsuch noise is within 5 - 15% of the variance of the data and that the\nvariability due to the linearly correlated processes is dominant in all cases\nanalysed but atrial fibrillation. The nonlinear deterministic content of heart\nrate variability remains significant and may not be ignored.",
    "arxiv_id": "physics/0611137",
    "authors": [
      "K. Urbanowicz",
      "J. J. Zebrowski",
      "R. Baranowski",
      "J. A. Holyst"
    ],
    "categories": [
      "physics.med-ph",
      "physics.data-an"
    ],
    "doi": "10.1016/j.physa.2007.05.052",
    "title": "How random is your heart beat?",
    "url": "https://arxiv.org/abs/physics/0611137"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2509f8c5-1cf4-44f6-8874-c20fdb45a50e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}