{
  "url": "https://dantelabs.com/traits/abnormal-heart-rate-variability",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "abnormal-heart-rate-variability",
    "id": "HP:0031860",
    "name": "Abnormal heart rate variability",
    "definition": "Any abnormality in the variability of the time interval between successive heartbeats.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-cardiovascular-system",
        "name": "Abnormality of the cardiovascular system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-cardiovascular-system"
      }
    ],
    "broader": [
      {
        "slug": "arrhythmia",
        "name": "Abnormal heart rate",
        "url": "https://dantelabs.com/traits/arrhythmia"
      }
    ],
    "narrower": [
      {
        "slug": "decreased-heart-rate-variability",
        "name": "Decreased heart rate variability",
        "genes": 4,
        "url": "https://dantelabs.com/traits/decreased-heart-rate-variability"
      },
      {
        "slug": "increased-heart-rate-variability",
        "name": "Increased heart rate variability",
        "genes": 1,
        "url": "https://dantelabs.com/traits/increased-heart-rate-variability"
      }
    ],
    "genes": [
      {
        "slug": "cdon",
        "symbol": "CDON",
        "hgnc": "HGNC:17104",
        "name": "cell adhesion associated, oncogene regulated",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/cdon"
      },
      {
        "slug": "cripto",
        "symbol": "CRIPTO",
        "hgnc": "HGNC:11701",
        "name": "cripto, EGF-CFC family member",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/cripto"
      },
      {
        "slug": "disp1",
        "symbol": "DISP1",
        "hgnc": "HGNC:19711",
        "name": "dispatched RND transporter family member 1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/disp1"
      },
      {
        "slug": "dll1",
        "symbol": "DLL1",
        "hgnc": "HGNC:2908",
        "name": "delta like canonical Notch ligand 1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/dll1"
      },
      {
        "slug": "fgf8",
        "symbol": "FGF8",
        "hgnc": "HGNC:3686",
        "name": "fibroblast growth factor 8",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/fgf8"
      },
      {
        "slug": "fgfr1",
        "symbol": "FGFR1",
        "hgnc": "HGNC:3688",
        "name": "fibroblast growth factor receptor 1",
        "frequency": "occasional",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/fgfr1"
      },
      {
        "slug": "foxh1",
        "symbol": "FOXH1",
        "hgnc": "HGNC:3814",
        "name": "forkhead box H1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/foxh1"
      },
      {
        "slug": "galc",
        "symbol": "GALC",
        "hgnc": "HGNC:4115",
        "name": "galactosylceramidase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/galc"
      },
      {
        "slug": "gas1",
        "symbol": "GAS1",
        "hgnc": "HGNC:4165",
        "name": "growth arrest specific 1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/gas1"
      },
      {
        "slug": "gli2",
        "symbol": "GLI2",
        "hgnc": "HGNC:4318",
        "name": "GLI family zinc finger 2",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/gli2"
      },
      {
        "slug": "nodal",
        "symbol": "NODAL",
        "hgnc": "HGNC:7865",
        "name": "nodal growth differentiation factor",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/nodal"
      },
      {
        "slug": "plch1",
        "symbol": "PLCH1",
        "hgnc": "HGNC:29185",
        "name": "phospholipase C eta 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/plch1"
      },
      {
        "slug": "psap",
        "symbol": "PSAP",
        "hgnc": "HGNC:9498",
        "name": "prosaposin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/psap"
      },
      {
        "slug": "ptch1",
        "symbol": "PTCH1",
        "hgnc": "HGNC:9585",
        "name": "patched 1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/ptch1"
      },
      {
        "slug": "shh",
        "symbol": "SHH",
        "hgnc": "HGNC:10848",
        "name": "sonic hedgehog signaling molecule",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/shh"
      },
      {
        "slug": "six3",
        "symbol": "SIX3",
        "hgnc": "HGNC:10889",
        "name": "SIX homeobox 3",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/six3"
      },
      {
        "slug": "smc1a",
        "symbol": "SMC1A",
        "hgnc": "HGNC:11111",
        "name": "structural maintenance of chromosomes 1A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/smc1a"
      },
      {
        "slug": "stag2",
        "symbol": "STAG2",
        "hgnc": "HGNC:11355",
        "name": "STAG2 cohesin complex component",
        "frequency": "occasional",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/stag2"
      },
      {
        "slug": "stil",
        "symbol": "STIL",
        "hgnc": "HGNC:10879",
        "name": "STIL centriolar assembly protein",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/stil"
      },
      {
        "slug": "tgif1",
        "symbol": "TGIF1",
        "hgnc": "HGNC:11776",
        "name": "TGFB induced factor homeobox 1",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/tgif1"
      },
      {
        "slug": "zic2",
        "symbol": "ZIC2",
        "hgnc": "HGNC:12873",
        "name": "Zic family zinc finger 2",
        "frequency": "occasional",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/zic2"
      }
    ]
  }
}