What can be done to prevent further complications of atheromatous artery, currently the patient has mild enlargement of the heart.

Healthy lifestyle: I don't know the patient's age , this patient already has atherosclerosis with anatomic changes noticed on the cardiomegaly, Patient need to have a cardiac diet , control blood pressure if HTN , control bs if diabetic , and have a statin to lower levels of lipids , cause of atherosclerosis , in some studies , even show reversal of atherosclerosis and also exercise oriented by your primary md.

Is BP high?: It all depends on the degree of obstruction of that (and other) arteries. GENERALLY, a low fat diet, active lifestyle, blood pressure control, and statin drugs are recommended to prevent heart attacks; your doctor may add several other things, based on the medical history. But it takes more than just a single atheromatous artery to cause heart enlargement. Is blood pressure high?

Diet,exercise: diet control, exercise, no smoking, blood pressure control, weight loss, avoid stress.