Hello, Severe atheromatous calcification build-up means calcium deposits in the coronary artery walls. Consult a cardiologist and start earliest treatment as plaque from calcium deposits form within the coronary arteries. The calcification makes the arteries stiff and less flexible; they reduce the blood flow to the heart muscle. Severe atheromatous calcification increases the risk of chest pain (angina), heart attacks, and other cardiovascular issues. She is advised to take healthy homemade balanced diet that is low in fats, she should not take refined flour, full fat dairy products, red meat, processed food or packaged food. She is also advised to do regular exercises and do walking to maintain healthy weight and improve cardiac health. She is advised to quit smoking and alcohol to help reduce further damage to the arteries. Her treating Cardiologist will treat her with medicines & lifestyle changes, or suggest medical procedures like angioplasty, atherectomy or CABG if required. Surgery and medical procedures are advised only when there is no improvement seen after treatment by medicines and healthy lifestyle. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician