Lars Rydén is Senior Professor of Cardiology at the Karolinska Institute, Stockholm, Sweden. He specialises in internal medicine and cardiology, focusing on arrhythmias, cardiac pacing, heart failure and diabetes-related cardiovascular disease. He has published more than 750 scientific papers. Lars Rydén is Dr h.c. at Katowice University, Poland, and an honorary member of the Royal College of Physicians, UK. Professor Rydén was the President of the Swedish Cardiac Society and chaired the Scientific Board of the Swedish Heart Lung Foundation. He was the President of the European Society of Cardiology (ESC), and served on the board of the World Heart Federation. He chaired ‘Alert which was a system for identification and early assessment of new methods in healthcare for the Swedish Council on Technology Assessment in Health Care. Lars Rydén has chaired numerous expert groups in collaboration with the European Society of Cardiology and European Commission e.g. the group that produced the European Heart Health Charter and The Chronic Disease Alliance – A Unified Prevention Approach. Professor Rydén chaired the Task Forces of the 2007 and 2013 ESC/European Association for the Study of Diabetes (EASD) Guidelines for Diabetes, Prediabetes and Cardiovascular Disease. In 2019 he received the Hellmut Mehnert award for outstanding contributions to the knowledge and understanding of diabetes.