I can understand your problem. I was taken ill rather suddenly with endocarditis (ulceration of the heart), complicated by a congenital bicuspid aortic valve (as opposed to the regulation tri-cuspid!). I was on antibiotics for 42 days and given a single bypass and aortic valve replacement. If I'd have known what surgery was involved, I'd have flipped! Fortunately, I was out cold anyway and woke up in hospital to find a load of concerned relatives around me. But, hey - I'm still here vexing people, and organising bits of Sidmouth!
Yes, the scars on my chest and legs are a nuisance, and I have Depuytren's Contracture in my left hand which mars my concertina playing (not so my melodeon playing). I'm still alive and licking, and feeling VERY positive. Hold on to that thought! Trust your consultant!