{
  "annotation_id": "0b4d119b-cdda-444d-bc5b-3b7baef46e57",
  "date_created": "2026-03-02T18:00:36.438000Z",
  "date_modified": "2026-03-02T18:00:36.438000Z",
  "file_hash": "fb935560fda963f7a4ae86db30f33331cdd9cee511bdf53db65721e33086c4f0",
  "private": false,
  "record": {
    "abstract": "We investigate the clinical and prognostic significance of fractal dimension\nand detrended fluctuation analysis by comparing the group of patients with\nstable angina pectoris without previous myocardial infarction with the group of\nage-matched healthy controls. The fractal dimension of the R-R series was\ndetermined using the rescaled range (R/S) analysis technique. To quantify\nfractal longe-range-correlation properties of heart rate variability, the\ndetrended fluctuation analysis (DFA) technique was used. The heart rate\nvariability was characterized by a scaling exponent $\\alpha$, separately for\nshort-term ($\u003c$ 11 beats), and for long-term ($\u003e$ 11 beats) time scales. The\nresults of data sets show the existence of crossover phenomena between\nshort-time scales. The short-term fractal scaling exponent was significantly\nlower in patients with stable angina pectoris.",
    "arxiv_id": "physics/0110010",
    "authors": [
      "G. Krstacic",
      "M. Martinis",
      "E. Vargovic",
      "A. Knezevic",
      "A. Krstacic"
    ],
    "categories": [
      "physics.med-ph",
      "q-bio"
    ],
    "title": "Non-Linear Dynamics In Patients With Stable Angina Pectoris",
    "url": "https://arxiv.org/abs/physics/0110010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "55b39723-9b84-4157-a171-3fccc1459b5e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}