text: Yo, check it out, I'm 'bout to lay it down,
  Talkin' 'bout atrial fibrillation, the most common arrhythmia around.
  In the clinical scene, it's frequently seen,
  And it's linked to a higher risk of mortality, if you know what I mean.
  
  Various risk factors for AF have been found,
  And we've proposed mechanisms for induction and maintenance, profound.
  When we study patients with this condition,
  We see changes in the atria, but there's still some confusion.
  
  The relationship between structural remodeling and the arrhythmia's duration,
  It ain't crystal clear, needs further exploration.
  Adaptive changes like cardiomyocyte dedifferentiation,
  And maladaptive ones like cell degeneration with fibrosis, no hesitation.
  
  To understand the timeline of this structural shift,
  We need animal models, a perfect fit.
  Models that mimic chronic AF in humans,
  That's essential to unravel the truth, no assumptions.
  
  In this review, we'll break it down,
  Talk 'bout the structural changes, both in patients and animals, renowned.
  We'll discuss the timeline and potential mechanisms,
  And methods to uncover the molecular secrets, no skepticism.