This book is intended for students in the 4th year of the second clinical cycle of medical studies, medical interns, and general practitioners wishing to deepen their practical knowledge in cardiology. We have, through these 30 clinical cases, inspired by real patients treated in the cardiology emergencies of the Blida University Hospital, tried to share the daily life of our cardiologists and emergency doctors. Without being exhaustive, we have treated a good part of the cardiovascular emergencies that we encounter every day, through clinical situations enriched with real, rich, and commented iconography. We hope that this work will be useful to its intended audience and that it will represent a first edition of a long series. Good reading.