Jihad, do a Google search on "cannabis heart disease" and read what's there. The links above are not the whole story by any means. They're only the positive side of the story, and they don't cite the effects of whole cannabis on heart disease and heart disease risk, only the effects of isolated compounds like THC. The testing that's reflected in those links hasn't been on whole, smoked cannabis because testing of that sort isn't allowed.

My husband is a cardiologist, and he's adamantly opposed to smoked cannabis for patients with heart disease. It definitely increases the risk of heart attacks and strokes, particularly within the first couple of hours of smoking. Before the active compounds in the cannabis kick in, smoking first causes a vaso-constrictive response. My personal belief is that it's the act of smoking itself, since it changes the way your body uses oxygen, that causes that vaso-constrictive effect. You can feel it yourself, most likely. It's that period after smoking in which the heart rate speeds up and your heart's having to work harder to oxygenate your blood since inhaled smoke also contains carbon dioxide and all sorts of nasty particulate matter and byproducts of combustion. It's that period of the increased heart rate and increased blood pressure right after smoking that is the most risky period for heart/vascular risk. If you read at any length, you'll see that smoked cannabis isn't good for the lungs, either. If folks could just take in THC and CBD and let that be it, it'd be great for both lung and heart health. But they take in lots more than that, which is where the risk lies.

My husband may sign on later. He'll tell you that while the active compounds in cannabis are relatively harmless, the act of smoking all the nasty crap contained in whole smoke is an irritant to the arteries and veins and is, from what he and his colleagues see in their patients, an aggravator of arteriosclerosis. Again, that's because it's the whole smoke and not just the active compounds. The thing about the patients that go to him and his colleagues, though, is that they wouldn't go to him if they didn't already have heart disease, so I'm not sure that's a completely unbiased assessment. He doesn't want his heart patients smoking anything, but he'll tell them under the table that if they want to use cannabis they should eat or vape it.