Nothing you have written suggests an incorrect diagnosis, but only you can decide whether you need a second opinion. I am not sure why you think you have ventricular fibrillation - it does not stop on its own and always results in death unless immediate resuscitation occurs. Atrial arrhythmia are a possibility, but if you wore the event monitor for long enough, it should have picked this up. I hope this has been useful. Feel free to write back with further questions.
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