His research interests include invasive coronary physiology and imaging, coronary bifurcation lesion, analyses of vascular response and clinical outcomes with statin therapy. Prof. Nam has published more than 200 papers in peer-interviewed journals such as NEJM, JACC series, Circulation series, EHJ, Eurointervention and has served as invited reviewer in those journals. His work was awarded the Best publication prize by the Korean Society of Internal Medicine in 2019, 2014, and 2006. He serves as a member of the Academic Committee of the Korean Society of Cardiology, Vice president of Korean Bifurcation club, and an associate editor of the Korean Circulation Journal. He is also active as a member of many other Korean and international professional societies.