Non‐pharmacological treatment of refractory angina: The coronary sinus reducer, the new kid on the block

Refractory angina is defined as persistent angina (≥3 months) despite optimal medical and interventional therapies. It is increasing in frequency, due to the success of current medical and interventional therapies in improving the prognosis of coronary artery disease. Long-term mortality is similar to that of patients with asymptomatic stable disease, but it affects patients’ quality of life, and has a significant impact on health care resources.