Circular RNAs: key orchestrators of pathological remodeling in heart failure

Heart failure (HF) is a complex syndrome driven by structural remodeling, fibrosis, metabolic imbalance, and oxidative stress. Circular RNAs (circRNAs) have emerged as pivotal regulators in HF, distinguished by their covalently closed structure, stability, and tissue specificity. While they modulate myocardial hypertrophy, fibrosis, and metabolic pathways through mechanisms including microRNA (miRNA) sponging, protein interactions, and transcriptional regulation, emerging evidence highlights the