| Recruiting | N/A | 380 | Canada, US | Arm 1: treatment with Neovasc Reducer, Arm 2 (control): Implantation procedure with no device implanted, Arm 3 (unblinded, non-randomized): Single arm registry | Neovasc Inc., Shockwave Medical, Inc. | Refractory Angina | 06/25 | 12/28 | | |