Juhani Knuuti’s research has focused on the physiology and pathophysiology, diagnosis and new therapies of coronary artery disease, heart failure and metabolic diseases. The research is also focused on developing and utilizing novel noninvasive imaging methods (PET, SPECT, echocardiography, MRI and CT) that will help to determine the risk and severity of CHD and heart failure and provide guidance for therapy decisions. The recent focus in cardiac research has been on vulnerable plaques, cardiac remodelling and multimodality and hybrid imaging. In metabolic and diabetes research, the focus has been in the interactions between different organs and heart in the pathogenesis and development of the cardiac diseases.