I read everything you wrote. That does not necessarily mean I understood everything the first time through. My mind wanders and that is just the way I am. Many other people are the same way and that is why we need to repeat things and reread things.
"Marijuana also raises heart rate by 20-100 percent shortly after smoking; this effect can last up to 3 hours. In one study, it was estimated that marijuana users have a 4.8-fold increase in the risk of heart attack in the first hour after smoking the drug"
-NIH
Now, I don't know what study they are referring to or if the study was any good, but this is exactly the kind of statistical information they
would use to link marijuana with thousands of deaths.