I have been having this problem for a number of years but it has gotten worse recently. I get light headed and nausea with headaches when climbing stairs and or lifting things as light as 5 lbs. ie, golf clubs from my trunk or Moving furniture. Often times get these symptoms just getting out of bed or for seemingly no reason at all. They last for anywhere from 1 to 3 hours sometimes even longer. When I get them there doesn t seem to be anything I can do to lessen or relieve them. I am 69 yearsold and have had heart diease since I had an MI when I was 39 years old. I had an aggioplasty at 40 and emergency by-pass surgery at 41 as a result of a ruptured artery during another angoplasty. At 52, I had my first implanted defibrillator installed and 2 more since then. I exercise every day on a treadmill (set at an elevation of 5 and speed at 4mph.). I also can jog a mile and lift hand weights of 12 lbs. I never get the above symptoms while exercising but at times do get them when I am leaving the gym and have to go upstairs. I have had numerous stress echoes over the years going 12 to 14 minutes each time w/o any ischemia but my ejection fraction is only 35%. I should mention I may have had a TIA a few years back when I lost periferial vision in one eye. my nuerologist feel I may have neurologist thinks I may be having ocular E