Extended Data Fig. 5: Histological analysis.
From: Adhesive bioelectronics for sutureless epicardial interfacing

a–c, H&E stained histological appearance of the heart tissues dissected after 3 days of (a) only surgical procedures (for example, no treatment), (b) suturing of the patch without Alg-CA layer, and (c) implantation of the SAFIE. The image was magnified ×1 (left), ×5 (middle), and ×20 (right) to show each region where epicardial devices were implanted (red boxes) or not (blue boxes).