It seems like overall impact on your cardiovascular system and is more the issue than warfarin specifically. Doesn’t seem like a great choice for someone who already has heart issues:
newsroom.heart.org
That said I’m overweight and that’s clearly very bad for my heart. Not throwing stones just confirming that your concerns are valid.

The 411 on marijuana use and cardiovascular health ahead of 4/20 Day
DALLAS, April 17, 2023 — Legalization of marijuana, for both medical and recreational use, is on the rise across the U.S. The American Heart Association, the world’s leading nonprofit organization focused on heart and brain health for all, warns that...
That said I’m overweight and that’s clearly very bad for my heart. Not throwing stones just confirming that your concerns are valid.