Hello Im 81 years old and in the past year, I started getting severe hot flashes that start at my chest and go to my head.. its a paralyizing feeling which lasts 2-5 minutes.. Im dizzy, low energy, but no sweating.. just real hot.. I had several of them last night and also today. I went to see a cardio Dr and found out I have severe aortic stenosis, which I am in the process of having surgery in the near future.. Are these heat flashes caused by the narrowing of my valve? And why do these heat flashes come for a few days and a month goes by without any and then I suffer a few days again (having 10 a day.. and then gone again for another month.. Thank you, and I appreciate your help. Signed, Bill.