Effectiveness of Stellate Ganglion Block on Chest Pain Severity and ST-Segment Changes in Patients with Refractory Angina: An Interventional Study - Espahbodi, Ebrahim; Raji, Mahsa; Rahmani, Reza; Samimi, Saghar; Rahmanian, Mehrzad; Karbasforoshan, Ali; Sanatkar, Mehdi (Archives of Anesthesiology and Critical Care, 2026)