According to the World Health Organization, people most often die from cardiovascular diseases. Practicing American cardiologist Haider Warraich talks in a fascinating and detailed way about our heart - such an important, but such a vulnerable organ. You will learn about the structure and functions of the heart and coronary vessels, the most common diseases, their diagnosis, medications, as well as the pros and cons of popular methods treatments - catheterization, cardiac stimulation and electrical impulse therapy. The book is full of stories from the practice of the author and his colleagues and references to the history of medical science. Haider Warraich explains why women suffer from the same heart diseases as men, but the type of disease they have is completely different, what coronary diseases and cancer have in common, how evolution could lead us to a real epidemic of coronary disease, discusses the current state of global clinical cardiology and the prospects for its development in the era of the introduction of artificial intelligence.