I dont have scientific experience and information about plant therapy. But in my county (Iran) this field is very important and I know that Zingiber officinale is very useful for reducing platelet aggregation mainly by reducing TXA2 production
In traditional system of medicine used the Maney plants for against the CVD from that abelmoschus esculentus, asparagus racemosus, terminalia arjuna, tinospora cordifolia, annona squamosa.
Polyalthia longifolia is a plant that has ethno-medicinal uses as anti-hypertensive.It could also be useful in the treatment of other cardiovascular diseases.
Dear Babaei, this was part of review of literature of my thesis which is up to 2011(January) and their are many other studies conducted during 2011 to 2014 on other plants products. I want to suggest that prepare consolidated list up to 2014.
Basma, you can research more on Tribulus terrestris, it was said to be used in cardovascular problem but not specific to myocardial infarction traditionally.