Fig. 1

Unsupervised hierarchical cluster analysis of 16 microRNAs (miR) differentially expressed in heart tissues in response to anesthetic agents based on their relative expression levels. Columns correspond to samples and are labeled to indicate whether they represent samples from the etomidate group (E) or the propofol group (P). Each row corresponds to an individual miR. The miR names are given on the right, while the dendrogram for miR clustering is displayed on the left. The color key displays miR expression variance: red indicates a higher gene expression, green indicates lower expression, and black indicates the median value. The samples are divided into two groups: the etomidate group (E1, E2, E3), and the propofol group (P1, P2, P3)