How long you can live with cerebral infarction in your 70s depends on the size of the infarction and the site of the infarction. Some will affect the life expectancy and some will not, as follows: 1. Impact on life expectancy: If it is a large cerebral infarction, the condition is generally severe, and the patient may develop high cranial pressure, which can cause brain herniation in severe cases and can lead to death, which can occur within the acute period of onset, such as within 1-2 weeks of onset, or may die from complications, such as death from lung infection, urinary system infection, lower limb deep vein thrombosis causing pulmonary embolism, which can occur within two weeks or longer after the onset of complications. 2.Does not affect life expectancy: If it is a small cerebral infarction, after active and correct treatment, it may be clinically cured, or there may be sequelae, which generally does not affect the life expectancy of patients. Patients generally belong to the recovery period one year after the onset, and the shorter the time from the onset, the better the recovery effect, and timely treatment should be carried out at an early stage after the onset.