Whats the chance of someone who is already in their 70's surviving a heart operation?

Physiologic age: What determines the morbidity mortality risk of a cardiac operation is not necessarily the chronologic age but the nature of the operation needed the physiologic age and the comorbidities that the person has. The oldest aortic valve replacement patient was a retired physician in the east coast and had it done without any problems at the age of 100. So age itself is only one factor.