{
  "id": 777159,
  "title": "Scientists Tracked Cannabis Users' Hearts Day by Day—One Finding Stood Out",
  "url": "https://urgent.news/2026/08/13/scientists-tracked-cannabis-users-hearts-day-by-day-one-finding-stood",
  "topic": "ai",
  "section": "AI",
  "published": "2026-08-13T15:13:39.000Z",
  "source": {
    "name": "Newsweek",
    "slug": "newsweek",
    "url": "https://www.newsweek.com/scientists-tracked-cannabis-users-hearts-finding-stood-out-12312462"
  },
  "original_language": "en",
  "account": "A new study has found that regular cannabis users experience significantly fewer early heartbeats when they smoke or vape the substance, compared to days they abstain. The research, published in the Journal of the American College of Cardiology, involved 108 adults who regularly used cannabis but had no history of cardiac arrhythmias. Over 14 days, each participant wore monitors to track their heart, glucose, activity, and sleep patterns. On each day, they were randomly assigned to either inhale cannabis or abstain. The study found that cannabis users experienced about 9 percent fewer premature heartbeats on days they used the substance, compared to abstinent days. These early heartbeats, known as premature atrial contractions (PACs), are common and can contribute to heart disease. While the study does not suggest that cannabis is good for cardiovascular health, it provides insights into the biological mechanisms that produce premature atrial contractions and may spur further research into potential therapies.",
  "summary": "Senior author and researcher Gregory Marcus told Newsweek that the results may help identify \"novel therapies.\"",
  "key_points": [
    "Regular cannabis users had fewer premature heartbeats on smoking days.",
    "Study monitored 108 adults with no history of cardiac arrhythmias.",
    "Cannabis reduced premature atrial contractions by 9% compared to abstinent days."
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}