I am a 27yo M, with a reasonably normal height:weight ratio. My mother has some issues with benign heart murmur/skipped beats, otherwise, no heart problems in family history. About 10 months ago, I had a case of Atrial Fib. that resulted in me being cardioverted in the emergency room. During my 3-4 hour run of Atrial Fib, I experienced no other symptoms other than racing, irregular heartbeat. After this, I had an echocardiogram, several EKG's, holter monitor, event monitor, blood tests.