British actor Brian Blessed is set to undergo a heart operation next week (beg02Mar15) in the aftermath of his shocking stage collapse in January (15).

The veteran star has been diagnosed with "severe fibrillation", a condition that causes an irregular heart rate, but promises he will come out of surgery fitter than ever.

Blessed, 78, tells Britain's Daily Mirror newspaper, "They've promised it will make me feel like a 25-year-old for the next 30 years. I had severe fibrillation... I've put my heart under severe strain... I love life - there's no such thing as death. I want to live until I'm 110. At the moment I'm a bit of out of breath, but once I've had the work done and have had a short break, I'll be planning my next trip to Everest and a mission to Mars."