The primary objective of this prospective pragmatic randomised controlled trial (PRCT) in 3546 patients is to evaluate the possible superiority of a CT-based patient management over an ICA-based management strategy in stable chest pain patients with intermediate pretest probability (10-60%) of coronary artery disease. The primary outcome measure is the occurrence of MACE (MACE = major adverse cardiovascular events; defined as at least one of the following: cardiovascular death, nonfatal myocardial infarction, and nonfatal stroke) after a maximum follow-up of 4 years after CT or ICA. Secondary outcomes include health related quality of life, cost-effectiveness, cross-over to ICA/CT. Procedural complications are classified into major and minor. Major procedural complications are a composite end-point and include death, nonfatal stroke, nonfatal myocardial infarction and further complications prolonging hospitalization by at least 24 hrs. Possible procedural complications: Hematoma at the puncture site, secondary bleeding at the puncture site, bradycardia, angina without infarction, allergoid contrast agent reaction, stent migration, hypotension requiring treatment, headache, hyperthyreodism, skin tissue and nerve injuries, extravasate, cardiac arrhythmia, contrast-induced nephropathy (CIN), infections, femoral arterial occlusion (or arterial access vessel) or dissection, new requirement for dialysis, DVT/pulmonary embolism, closure or injury of vessels, injury of the heart (e.g. valve or myocardium), cardiac tamponade, perforation, retroperitoneal bleeding, gastrointestinal bleeding, genital-urinary bleeding, other major bleeding, red blood cell (RBC)/whole blood transfusion,twisting or rupture of the catheter part, other equipment mishaps (e.g. retained foreign body guidewire fracture), development of arterio-venous fistula(s), development of pseudo aneurysm at puncture site, dissection, permanent edema (e.g. due to lymphatic congestion at puncture site), embolisation of central or peripheral vessels due to thromboembolis, acute closure of coronary vessels, stent infection, heart failure, cardiogenic shock, wrong patient or wrong procedure and other.