Survival time for old infarcts may be longer if they are controlled without recurrence, or if the infarct is smaller in extent at the time of the attack and is treated promptly, but survival for 20 years varies from person to person. Generally speaking, if the old infarction is controlled without recurrence, or the infarction is small at the time of recurrence, and can be effectively treated, including having ECG monitoring, oxygen, analgesia, anticoagulation, and reperfusion myocardial therapy, etc., it may have a mild impact on survival, and whether it can live for 20 years needs to be based on the treatment after recurrence as well as the usual control situation. However, if the recurrence cannot be treated in time or the infarction area is too large, serious arrhythmia, shock, heart failure and other complications are likely to occur, and these may make the survival period shorter, or even direct sudden death. However, in either case, prompt medical treatment is recommended.