{
  "url": "https://dantelabs.com/traits/atrial-standstill",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "atrial-standstill",
    "id": "HP:0025478",
    "name": "Atrial standstill",
    "definition": "Atrial standstill or silent atrium is a rare condition presenting with the absence of electrical and mechanical activity in the atria. It presents with the absence of P waves, bradycardia, and wide QRS complex in the electrocardiogram.",
    "synonyms": [
      "Silent atrium"
    ],
    "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": "supraventricular-arrhythmia",
        "name": "Supraventricular arrhythmia",
        "url": "https://dantelabs.com/traits/supraventricular-arrhythmia"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "emd",
        "symbol": "EMD",
        "hgnc": "HGNC:3331",
        "name": "emerin",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/emd"
      },
      {
        "slug": "gja5",
        "symbol": "GJA5",
        "hgnc": "HGNC:4279",
        "name": "gap junction protein alpha 5",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gja5"
      },
      {
        "slug": "nppa",
        "symbol": "NPPA",
        "hgnc": "HGNC:7939",
        "name": "natriuretic peptide A",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/nppa"
      },
      {
        "slug": "scn5a",
        "symbol": "SCN5A",
        "hgnc": "HGNC:10593",
        "name": "sodium voltage-gated channel alpha subunit 5",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/scn5a"
      },
      {
        "slug": "casq2",
        "symbol": "CASQ2",
        "hgnc": "HGNC:1513",
        "name": "calsequestrin 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/casq2"
      },
      {
        "slug": "ryr2",
        "symbol": "RYR2",
        "hgnc": "HGNC:10484",
        "name": "ryanodine receptor 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ryr2"
      },
      {
        "slug": "trdn",
        "symbol": "TRDN",
        "hgnc": "HGNC:12261",
        "name": "triadin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trdn"
      }
    ]
  }
}