{
  "annotation_id": "ab065c74-2db3-4f66-968f-7d9588f34e0f",
  "date_created": "2026-03-02T18:01:21.353000Z",
  "date_modified": "2026-03-02T18:01:21.353000Z",
  "file_hash": "48f6124e4adb8175c3e2db8eeef353cee4dd37de96171282921aeb2d219c9de0",
  "private": false,
  "record": {
    "abstract": "A method is proposed to analyze the heartbeat waveform that can yield a\nreliable characterization of the structure after only a few pulses. The measure\nsuggested is entropy index that is related to the one found effective in\ndescribing chaotic behaviors in a wide variety of physical systems. When\napplied to the ECG data that include ventricular fibrillation, the index is\nshown to change drastically within a few pulses. Wavelet analysis is used to\nexhibit different scaling behaviors in different phases.",
    "arxiv_id": "physics/9809041",
    "authors": [
      "Rudolph C. Hwa"
    ],
    "categories": [
      "physics.med-ph",
      "hep-ph",
      "nucl-th",
      "q-bio.QM"
    ],
    "title": "Entropy Index as a Measure of Heartbeat Irregularity",
    "url": "https://arxiv.org/abs/physics/9809041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "11085df3-d240-4000-82d5-506369a8391a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}