ABSTRACT
This first chapter introduces the domain of eHealth and describes the relationship between technology, psychology and healthcare. It provides an overview of current visions of eHealth. A brief description of the changes in healthcare, society, technology and psychology that are related to eHealth is provided. After this fundamental discussion, we continue with how eHealth can be applied in healthcare by explaining three types of eHealth: self-care and prevention, supportive care and societal health. Also, the benefits and barriers of the use of eHealth are demonstrated. Then, the holistic approach towards eHealth is introduced, in which technology, people and their context are intertwined. Finally, principles that are pivotal in good eHealth development are provided.
