Hi, Your mother is suffering from coronary artery disease single vessel disease .the artery affected is left anterior descending artery(LAD)Coronary artery disease is the narrowing or blockage of the artery or arteries supplying blood to the heart muscle. This narrowing is caused by plaques, which are cholesterol deposits on the vessel wall, resulting in abnormal and gradual thickening of the lining of the heart arteries (a condition known as atherosclerosis). The narrowing usually develops slowly over many years.Treatment for coronary artery disease is dependent on the extent of the disease and the symptoms experienced by the patient. Eating a healthy and balanced diet, with more vegetables or fruits, is important in protecting our heart arteries. Food that are rich in fats, particularly saturated fats, can lead to a higher level of cholesterol, which is a major component of the deposits that contribute to the narrowing of heart arteries. Regular exercise plays a vital role in keeping the heart healthy. Exercise helps us to become fitter and build a stronger circulatory system. It also helps us to lose weight. Obesity is unhealthy, as it leads to a higher incidence of hypertension, diabetes mellitus, and high lipid levels, all of which can damage the heart arteries.PTCA is advised in your mother case .This is a minimally invasive method of ‘unblocking’ a narrowed heart artery. Through a plastic sheath placed in an artery in either the groin or the wrist, a balloon can be delivered to the narrowed segment of the heart artery, where it is then inflated to open up the narrowing. Thereafter, a small wire mesh tube (stent) can be deployed to help keep the artery open. Stents can be either plain (bare-metal) or have medication coated on it (drug-eluting).For all these you need to consult interventional cardiologist