Writing this book responds to the challenge of giving a simple answer and simultaneously respond to the many questions daily asked by our patients with vasovagal syncope. Also medical students and non- specialists can find here a modest basis to begin in this exciting topic. Each note has a reference as an internet link to facilitate the reader to deepen into each topic. Thanks to EAE for the interest and support they have shown in publishing this project. Pedro Jiménez - Cohl MD.