Some folks said supra-physiological dosages of Testosterone, like we do for our muscle mass gaining, may helps cardiovascular diseases and/or preventing them; others, said it could be harmful.... but many studies, move towards the latter....
Testosterone increases human platelet thromboxane A2 receptor density and aggregation responses. - PubMed - NCBI
Anabolic steroids and fibrinolysis. - PubMed - NCBI
[Cardiovascular side effects of anabolic-androgenic steroids]. - PubMed - NCBI
Cardiovascular effects of androgenic-anabolic steroids. - PubMed - NCBI
You can control and adjust HCT, E2, HDL/LDL and others things... but you cannot control many others things which are others increased risks factors as:
Impaired fibrinolysis, increasing thromboxane A2 density, direct cardiac toxicity, impaired vascular reactivity and direct endothelium damages, etc...
No one knows what are the dosages and what AAS within which taking aspirin and other drugs to balance from the other sides, could guarantee a safe cycling profile. So,
one way or another, it's always like to play to Russian Roulette. The increased risk, in time, to die suddenly, it's always behind the shadow, given the facts, even with a moderate supra-physiological dosages.