The final two paragraphs of that article are the most important:
Tracy Parker, a senior dietician at the British Heart Foundation, said: “To keep your heart healthy, a healthy lifestyle is what really matters rather than how much coffee, chocolate or alcohol you consume. That means getting regular exercise, giving up smoking and eating well.
“When it comes to our diet, it’s the balance of your whole diet that has the most impact. Try to eat more of the good stuff like fruit and vegetables as well as wholegrains, beans, nuts and seeds, and less of those foods high in salt, sugar and saturated fat like cake, biscuits and sweets.”
IANAD but I do read & write about this stuff for a living (and get doctors to check my work).