Thank you. I am seeing a cardiologist, because I sometimes have incidents of chest constriction, discomfort, sometimes lightheadedness (and now on Losartan I seem to have that every morning). These episodes pass in 10-15 minutes, but they leave me feeling weak. I ve had high blood pressure for several years and have been taking Atorvastatin and Metoprol, now also Losartan. I fear a real heart attack or stroke. This past week I had a chemical stress test and will find out next Friday if it revealed the cause of my condition. I also will let the doctors implant a very small heart monitor under my skin in two weeks. I just hope I last that long! I am really worried. My cardiologist thinks it s either A-fib or a blockage. Neither sounds very good. I haven t passed out yet, but about a month ago one of my constrictive events resulted in a dimming situation. After 3 Nitrostats and putting my head on my knees, I recovered, but that is the episode that got me referred to the cardiologist I m now seeing. Of course I ll be interested in your opinion.Thank you again. - Helene Langtry