Figure 2
Top row: macroscopic (left) and microscopic (right; stained with hematoxylin and eosin) images of acute atrial ablation injury. Microscopic histology demonstrates transmural injury with coagulative necrosis, hemorrhage and interstitial edema. Bottom row: macroscopic (left) and microscopic (right; stained with Masson’s Trichrome) images of chronic atrial ablation injury. Microscopic histology demonstrates transmural replacement of normal atrial wall with fibrous scar tissue.