All patients with CHD, who will be admitted for cardiac rehabilitation to the participating German rehabilitation clinics and in whom LLT is indicated will be included. Written informed consent will be obtained from each participant. Beginning of the study is 1st May 2016, the inclusion of the last patient is expected on 30th April 2016. Follow-up: at 3 and 12 months, respectively, inclusion of 100 participants per clinic is expected.