Heart doctors in yelahanka European Society of Cardiology (ESC) classification of stable angina Typical angina Meets all three of the following criteria: 1 Characteristic retrosternal chest discomfort—typical (see below) quality and duration 2 Provoked by exertion or emotion 3 Relieved rapidly by rest or glyceryl trinitrate (GTN), or both Atypical angina Meets two of the above criteria Non-cardiac chest pain Meets one or none of the above criteria