How long dose a quad bypass last i had one 10 years ago not smoked for 11 years been diabetic 15 below knee amputee 2 years.

Mammary?: Most people would say 10-15 years but some mammary bypasses have long surpassed that. If you have been active, not smoked and managed your blood pressure and diet reasonably well your body may have grown collateral circulation as well to protect the hearts bloid supply even if the bypasses fail over time. Have to see cardiologist regularly and dont ignore symptoms

Can't give a number: It's unusual for a female to have 4-vessel disease @ 26 so I think there's something genetic here. While genes can't yet be treated, other risk factors can. Glad that you quit smoking & hope your diabetes is well controlled. Your weight, blood pressure, cholesterol & triglycerides also need tight control. Your bypass will last longer if you address all these issues & I do wish you the best.

Heart Disease: I assume you are referring to a coronary artery bypass surgery. The extent of how long your blood vessels will remain functional and unclogged is a difficult one to answer! Some bypass surgeries are good for life while others may become diseased or "clogged" after a short amount of years. Multiple factors dictate this such as cholesterol, sugar levels and genetics.