In this issue of Heart Failure Clinics, guest editor Dr. Ragavendra R. Baliga brings his considerable expertise to the topic of Epigenetics of Heart Failure. Top experts in the field explore how chemical modifications to DNA and histones influence gene expression without altering the genetic code, contributing to the development and progression of heart failure. Factors such as DNA methylation, histone modifications, and non-coding RNAs can regulate key pathways involved in cardiac remodeling, inflammation, and fibrosis. Environmental influences like diet, stress, and toxins can also impact these epigenetic changes, potentially worsening heart function. Understanding these mechanisms may lead to novel therapeutic targets for preventing or treating heart failure at the molecular level.