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  "path": "/news/2026-06-triggered-arrhythmia-reveals-rapid-brain.html",
  "publishedAt": "2026-06-05T11:40:06.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "An irregular heartbeat, or arrhythmia, leads to inefficient pumping of blood by the heart, which then prevents blood and oxygen from getting to the body's other organs. When blood and oxygen flow poorly to the brain, the risk of stroke and cognitive decline increases.",
  "title": "Light-triggered arrhythmia reveals rapid brain oxygen shifts in mice"
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