Please help, how much notice should you receive before undergoing triple bypass heart surgery?

Maybe not much: Sometimes, as the situation dictates, you may need immediate surgery, within just a few hours of presentation of cardiac symptoms. All depends on what is found during investigation, and what options are or are not available. Good luck.

Depends: The symptoms or signs lead to cardiac catheterization and definition of the anatomy which may be suitable for cabg. Full risks, benefits and options should be presented to you. Depending on the symptoms, severity, anatomy the procedure should be done sooner than later.