From Newsweek:

Using cannabis has been linked to changes in the structure of the heart in a study.

Researchers interviewed and assessed heart the scans of 3,407 participants for the study. The volunteers were placed in three categories: those who said they used cannabis never or less than once a month; previous regular use at daily or weekly up to five years before the interview; and current regular or daily or weekly within the past five years.

The volunteers were aged 62 on average. Of the total, 47 were regular users, 105 previously used the drug regularly, and 3,255 had rarely or never used weed.

Read the full story at Newsweek.