Researchers Try to Tie Cannabis to Irregular Heartbeats, Opposite Turns Out True

A recent study published in the Journal of the American College of Cardiology suggests that regular cannabis users may experience fewer ectopic heartbeats on days they consume cannabis, contrary to initial expectations. The randomized crossover trial involved 108 adults who regularly smoked or vaped cannabis, with no history of clinically diagnosed cardiac arrhythmias.

The participants were randomly assigned each day to inhale cannabis products or abstain completely. On days when participants used cannabis, there was a significant 9% reduction in ectopic heartbeats, with a median of 13 per day on cannabis days compared to 13.8 per day off cannabis. The researchers noted, however, that there were still uncertainties regarding the clinical implications of these findings due to factors such as imperfect adherence, possible carryover effects, and heterogeneous exposure.

The most conservative interpretation of the data may be that inhaled cannabis did not increase cardiac ectopy. The study's findings could provide insights into the biological mechanisms behind premature atrial contractions, potentially leading to new approaches for preventing or treating abnormal heart rhythms.