I was having a good day. Took my daughter to the St Patricks Parade and we were having a wonderful time. Right in the middle of it my heart just went haywire. Beating erratic and seemed slow and then fast. I almost blacked out. It passed in about 10 seconds and then I was fine though my mood was very down and I could enjoy nothing. I am very afraid and sad. I have been unwell for 15 years. I have autonomic problems with my BP dropping when i stand and I have had arrhythmias on and off through this whole time. I have had about 5 severe arrhythmias (like todays) in this time. I have been through EP studies and holter monitors all to no avail. Anyway........ anyone else go through this?