A diet rich in saturated fats (meat, butter, cheese, etc.), in sugars and low in fibre is frequently the cause of lipidic imbalance which can cause cardio-vascular problems. It can be beneficial to help the body through the provision of plant-based substances (phytosterols, fibre, etc.) which reduce the absorption of lipids and cholesterol via the intestines. Also add EPA and DHA to your food, which reduce cardio-vascular mortality*. Most adults under 65 do not consume enough!
Take care of your blood vessels, which are in particular subjected to assault by free radicals, by adding minerals and vitamins to your dishes to provide protection against oxidative stress (Se, Cu, Mn, Vit.C and E) and plants which specialise in providing veinous flexibility.
And take exercise! Muscle condition is vital for vascular condition: walk, swim and cycle as much as you like!
*Report by ANSES. May 2011. Latest figures for recommended intake of fatty acids. [2000,13(1) :29-36].