The evidence is stacking up that the drug is associated with a greater likelihood of heart problems.

While most Americans consider marijuana safe, new research published this week found that use of the drug is associated with a higher risk of stroke and heart attack, including among younger adults.

The analysis, which examined data from 24 studies and was published in the journal Heart, also found that marijuana use was associated with a twofold increase in the risk of death from cardiovascular disease. While this data only shows a correlation and cannot prove that marijuana caused these effects, it is well-established that the drug can raise blood pressure and heart rate and alter the heart’s rhythm, said Dr. Ersilia DeFilippis, a cardiologist at Columbia University Irving Medical Center. And a number of other studies have also suggested a link between the drug and cardiovascular issues...