There is no standardized data on how many years one can live with potassium deficiency, and it is recommended that active treatment be provided under the guidance of a doctor. How long you can live after potassium deficiency returns to normal is generally related to the degree of potassium deficiency. Generally, mild ischemia does not affect life expectancy after correction, while severe potassium deficiency may lead to severe arrhythmia, cardiac arrest and sudden death. 1. Mild potassium deficiency: potassium can be supplemented by oral potassium chloride, potassium citrate, and potassium-rich foods, such as bananas, tangerines, oranges, etc. Through effective treatment, life expectancy is usually not affected. 2. Severe potassium deficiency:Severe potassium deficiency is more difficult to correct, in addition to oral supplementation of potassium, but also intravenous potassium supplementation, potassium supplementation should pay attention to the speed and concentration of potassium supplementation, severe potassium deficiency is more critical, at any time may lead to severe arrhythmia, cardiac arrest and so on. Patients with potassium deficiency should go to the hospital in time and be treated under the guidance of doctors.