The book provides an intensive overview of exosomes in cardiovascular diseases, their potential as biomarkers, and pathological and therapeutic effects. It first describes the general aspects of exosomes, including their definition, formation, and secretion. It also highlights their roles as biomarkers and pathological and therapeutic effects in cardiovascular diseases. Secondly, fundamental aspects of exosomes, including the purification methods of exosomes, exosome content, and functional roles of the cardiovascular exosomes, are summarized. Thirdly, exosomes as biomarkers of cardiovascular diseases are overviewed, including their roles in diagnosis, prognosis, and reaction to therapy. Fourthly, the pathological effects of exosomes and therapeutic effects of exosomes are highlighted. Finally, prospects of exosomes in cardiovascular research will be provided. This is an essential reference for researchers working in cell biology and regeneration, as well as clinicians such as cardiologists.