At a time of increasing legalization of marijuana, a growing number of people under 50 diagnosed with cannabis use disorder were later hospitalized for a heart attack, new research has found.

The rising trend from 2007 to 2018 was most pronounced in three groups: ages 18 to 34, men and African Americans, according to findings being presented this Sunday at the American Heart Association’s virtual Scientific Sessions conference. The results are considered preliminary until published in a peer-reviewed journal.

Although AHA statistics show heart attacks are much less common in people under 50 compared to older adults, the study suggests people who use cannabis should be followed more closely for possible heart problems.

Now that cannabis is becoming legal in many states, “we need to specifically pay attention to this,” said lead researcher Darshi Desai, a clinical observer at the University of California Riverside who is applying for her medical residency.

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