This guy, Dr. Amen has been talking about this from a neuroscience/brain health perspective for years. While not exactly heart-health per-se, there is much overlap.
He talks about blueberries, kale, salmon, olive oil, green tea, raw cacau, folate, exercise, quality sleep and much more.
To be sure, there is a lot of toxic "food" on our local grocery shelves.
https://danielamenmd.com/pbs-shows/