Exercise testing - Summary of recommendations and evidence
Low-risk patients (according to clinical and ECG results) with normal biomarkers should be referred for ET after 9 to 12 hours of observation. In chest pain unit routines, these exams can be performed as a discharge criterion.	I	B
If an ET cannot be performed or the ECG is uninterpretable (left bundle branch block, artificial pacemaker, atrial fibrillation, LV overload, etc.), the patient can undergo ischemia tests associated with non-invasive imaging.	I	B