Ric Flair is finally detailing the specifics of his recent health scare ... telling TMZ Sports he underwent surgery to receive a pacemaker -- and now plans to live 25 more years!!!
Now that Naitch is back home and feeling great ... he joined the guys on "TMZ Sports" TV show and reflected on his week in the hospital.
Ric says he went in to fix an issue with his heart ... and tells us he's confident the doctors fixed him just right -- hooking him up with a new pacemaker.