Thank you for your reply. AVNRT? I was diagnosed with Atrio ventricular reentry tachycardia. The day after I had my surgery the physician told me to toss the medications. I began having attacks when I was 17 and wasn't diagnosed until the year I had my surgery then 34. By that time they were quite severe and medications couldn't even prevent them. My regular Dr. put me on Lopressor and wanted to wait and see what happened, that made me very sluggish and my heart felt like it was barely beating which scared me. I changed Dr.'s so that I could get a referral to a Cardiologist. He put me on two medications one to take daily and one to take at the onset of an attack. Diltiazem (Cardizem)sounds familiar. The last two attacks that I had, neither medications worked, luckily the Cardiologist had put a halter monitor on me the day before and everything was caught on it. They scheduled the surgery for the next day. The EMT's gave me a shot of something both times (I can't remember the name of either)my heart, which went well. I was quite conscious and aware of what was going on, so they gave me the option of it or being shocked, like someone awake wants to be shocked , HA. It really does seem like the onset of my memory problems began all around this time, as well as being able to focus. I will continue to try and look for information on it, and as soon as we have insurance again see a physician, maybe it isn't related, but I just feel as though it is.