The Ashman phenomenon, also known as Ashman's phenomenon or Ashman beats, is a cardiac arrhythmia that occurs in individuals with atrial fibrillation. According to medical sources, there are no official synonyms for the term. However, some alternative phrases that may be used to describe the Ashman phenomenon include Ashman's response, Ashman's rule, or the Ashman effect. These terms all refer to the same phenomenon where the conduction pathway in the heart changes, resulting in a different pattern of electrical impulses. While these terms may not be widely recognized, they can help clarify the condition for those who are unfamiliar with its medical terminology.