Smoking cannabis can cause potentially lethal damage to the heart and arteries of young and middle-aged adults, a study has found.
Researchers in France who looked at almost 2,000 patients with medical problems related to cannabis use identified 35 serious instances of cardiovascular complications.
Twenty heart attacks were recorded, as well as 10 cases involving arteries in the limbs, and three affecting blood vessels in the brain. Nine patients, around a quarter of the total, died.
Most of the patients in the study - published in the Journal of the American Heart Association - were male, with an average age of 34.3 years.