I am using the term Ornish diet to describe a healthy plant based diet. But you can also check out Dr. Esselstyn since you have CAD. Here is a link to one study per your request but look up the risk factors for stroke, how diet can help, an what ones you have.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8166423/#:~:text=A%20healthful%20plant%2Dbased%20diet%20was%20significantly%20associated%20with%20a,foods%20for%20cardiometabolic%20health%20outcomes.