José Luis Zamorano is Professor of Medicine at the University Alcala in Madrid and Director of the Cardiovascular department at the University Hospital Ramon y Cajal, Madrid. His key research interests include ischaemic heart disease, cardiovascular risk factors and imaging modalities. Professor Zamorano is Past President of the European Association of Echocardiography (EAE) and Past President of the Working Group on Non-invasive Diagnostic Imaging of the Spanish Society of Cardiology. Currently Vice president of the European Society of Cardiology. He served on numerous Editorial Boards, including the European Journal of Echocardiography, the American Society of Echocardiography and the European Heart Journal. He has authored over 400 articles for peer-reviewed journals. He gained his MD from the University Complutense in 1987. Patricio Lanzelloti is a pioneer in the field of valvular heart disease. He has published several papers related to the main topic of the present book and is part of the guidelines writing group on valvular heart disease. He has already co-edited several books including the secondary mitral regurgitation with Khalil Fattouch. Luc Pierard is honorary Professor of Medicine at the University of Liège, Belgium and was Head of the Department of Cardiology of the University Hospital Sart Tilman in Liège from 2002 to 2017. He was the first to demonstrate the utility of dobutamine stress echocardiography for identifying myocardial viability and ischemia and to use exercise echocardiography in valvular heart diseases. He was President of the Belgian Society of Cardiology and had several positions in the European Society of Cardiology: he chaired the Working Group on Echocardiography and is currently chairperson of the ESC Council in Valvular Heart Disease. He is Editor-in-Chief of Acta Cardiologica and Senior Associate Editor of the EHJ Cardiovascular Imaging. He has published more than 400 peer-reviewed articles (many on valvular heart disease) and more than 50 book chapters. Philippe Pibarot is professor at the Department of Medicine of Laval University and holds the Canada Research Chair in Valvular Heart Disease (VHD) at the Québec Heart & Lung Institute. He has published more than 500 articles and presented >800 invited conferences in the course of his career and he is among the most influential scientists in the field of Medicine according to the Clarivate Analytics Highly Cited Researchers 2018. He received the Research Achievement Award, Canadian Cardiovascular Society (2010) and a Doctorate Honoris Causa of University of Liège, Belgium (2017).