Cardiovascular diseases are a leading global cause of death. Coronary heart disease stands as the most prevalent, posing a significant global health challenge. The proper functioning of organs hinges on well-defined anatomical structures, making it imperative to comprehend the fundamental histological characteristics of the heart. In this manuscript, we explore microscopic features of acute myocardial infarction, post-myocardial infarction (post-MI), left ventricular hypertrophy, and fatty heart. The research, conducted ethically, utilized microscopic images captured at Uzhhorod National University, Ukraine. Specimen analyses revealed distinct histological changes associated with conditions such as intracellular lipid accumulation, myocardial hypertrophy, and acute myocardial infarction. This exploration serves as a valuable resource for students, researchers, and healthcare professionals seeking a deeper understanding of cardiac microanatomy, offering insights crucial for accurate diagnosis and management in cardiovascular healthcare.