Retrospective Study to Estimate the Current Status of Patients With Non-Obstructive coroNary Artery Disease

Inclusion Criteria: * Participants who had typical or atypical angina symptom before Coronary Angiography examination * Underwent CAG between 01 Jan 2013 and 31 Dec 2015 * Other protocol defined inclusion criteria could apply Exclusion Criteria: * Participant with history of percutaneous coronary intervention or coronary artery bypass surgery * Participant with history of myocardial infarction * Participant with history of cardiac transplant or valve surgery * Presenting with Acute myocardial infarction for coronary angiography * CAG showed myocardial bridge and coronary stenosis greater than or equal to 50 percent during systole period * Incomplete or missing data in CAG report * Other protocol defined exclusion criteria could apply