Morning all...Newcomer here who is based in the UK. I was recently diagnosed with a bicupsid aortic valve causing severe aortic stenosis. I have surgery booked for December to have it replaced and to have a section of the ascending aorta also replaced but to dilation. Surgeon has recommended a mechanical valve (Medtronic or On-X) based on my age and relatviely active life style. Until my doctor found a heart murmur 6 weeks ago I had no idea I had this problem so the last few weeks have been a real roller coaster. Other than this I am a fit and healthy 52 year old. The difficulty I have at the moment is valve type choice. It seems to boil down to going bio valve now and facing a re-operation in 15 years (if I am lucky) or go mechanical now, expect never to need a re-operation but be on warfarin and have a significant risk of a stroke or bleed hanging over me for the rest of my life. From what I have read online it seems risk of stroke or bleed with mechanical valves is around 2% per patient year. So if I hope to live another 30 years this to me means I have a 60% chance of stroke or bleed in this time. Have I understood 'per patient year' correctly? Is the risk really that high? Cheers, John.