Dr Ng Kwan Chung Kenneth Cardiology A fast, irregular heart beat can be triggered by anxiety or emotional stress, but it may also be a symptom of a condition called atrial fibrillation. My Pounding Heart: Is it Anxiety or Atrial Fibrillation? https://www.mountelizabeth.com.sg/healthplus/article/heart-palpitations-is-it-anxiety-or-atrial-fibrillation (0) Share This