How long an elderly person can live with insufficient blood supply to the heart is related to the degree of onset of the disease, whether it is actively treated, and whether it is combined with cardiac arrhythmia. Patients with mild myocardial ischemia can survive for a long time with active treatment, while sudden death may occur if the patient’s myocardial ischemia is more severe and not treated in time. 1. If the patient has mild myocardial ischemia, with reasonable and active treatment, it will not affect the life expectancy too much and can have a long survival period. 2. If the insufficiency of blood supply to the heart is more serious, such as acute myocardial infarction leading to severe heart failure or combined with arrhythmia, coupled with the lack of timely treatment, sudden death may occur. It is recommended that patients usually maintain a good state of mind, increase immunity, avoid fatigue, eat a light diet, low salt and low fat, and consult a doctor for treatment of uncomfortable symptoms in a timely manner.