WWE legend 'Hacksaw' Jim Duggan says he's thankful to be alive after a serious medical scare over Thanksgiving weekend ... telling TMZ Sports the whole experience was terrifying.
64-year-old Duggan was hospitalized last week after feeling "out of shape" and sensing a pain in his chest ... and says he had 6-8 people working on him in the ICU at one time.
Turns out ... Hacksaw's heart had gone into Atrial fibrillation -- a.k.a. A-fib -- which, according to medical sites, is an irregular heartbeat that can lead to strokes, blood clots and other heart problems
While it's not necessarily a life-threatening condition .