Bird pretty much said exactly what I'd have said above. Only she said it better than I could have.

My gut and everything I've seen in practice and read in articles tells me smoked cannabis isn't good for the heart. Most of that is because of the act of smoking and not so much the cannabis content. The by products of combustion are not healthy chemicals for anyone's heart or lungs. Anything that affects the lungs negatively also affects the heart negatively. If people could eat or vaporize their cannabis, they'd get the beneficial effects and not the negative ones, at least those who don't have arrhythmias. I don't know that cannabis aggravates heart disease or brings it on if it doesn't exist beforehand, but I do know that for people with a risk, it can increase that risk because it competes for oxygen, puts new stresses on the heart by doing so, and brings in bad chemicals and particulate that can irritate vascular walls and aggravate arteriosclerosis If it just brought in THC and CBD, that'd be a lot better, but all the crap comes along with an inhalation, too.

I don't want my patients smoking anything, as Bird said. I'm not stupid enough to believe they abstain just because I say that, though. I'd sure as hell rather they smoke cannabis than cigarettes. Bird was showing me the lung health studies a while back, and after I saw those I decided that I wished that cigarette smokers would all take up cannabis as protection against pulmonary carcinomas. The studies that that Dr. Tashkin at UCLA has done are very persuasive about it lowering the cancer risk.

Cannabis, as we learned first hand at home last year and as I've seen repeatedly in my patients, is not good for people with diseases of arrhythmia. Even eaten cannabis seems to trigger rhythm changes in people with that problem.