Scientists Tracked Cannabis Users' Hearts Day by Day—One Finding Stood Out
Summary
A new study tracked 108 regular cannabis users over 14 days and found they had fewer early or extra heartbeats on days they used cannabis compared to days they did not. The study suggests cannabis use might reduce a type of heartbeat irregularity linked to atrial fibrillation, but it does not prove cannabis is good or safe for heart health.Key Facts
- The study involved 108 adults who regularly smoked or vaped cannabis and wore heart and health monitors continuously for 14 days.
- Each day, participants were randomly assigned to either use cannabis or abstain from it.
- On cannabis use days, participants had about 9% fewer premature heartbeats starting in the heart’s upper chambers (premature atrial contractions or PACs).
- PACs can predict atrial fibrillation, a heart rhythm problem that may cause stroke or blood clots.
- No significant change was found in premature beats starting from the heart’s lower chambers (PVCs), which predict heart failure.
- The study found no differences in sleep, physical activity, or blood sugar between cannabis and non-cannabis days.
- Researchers warn the findings do not mean cannabis is safe or beneficial for heart health.
- This study used a randomized crossover design, considered better than observational studies for reducing bias.
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