Cannabis smoking and myocardial infarction
Channel: International Journal of Clinical Practice
Date: 2012-01-19

Cannabis smoking immediately causes an increase in heart rate, sympathetic activity and blood pressure; the carboxyhaemoglobin level increase from smoking and arterial vasospasm. Taken together, these lead to increased oxygen demand with reduced blood supply leading to ischaemia in the right circumstances.

Read the paper: http://onlinelibrary.wiley.com/doi/10.1111/j.1742-1241.2011.02834.x/pdf