Coronary Sinus Reducer implantation

Subject after Coronary Sinus Reducer implantation due to chronic disabling refractory angina pectoris (Canadian Cardiovascular Society \[CCS\] classes 2-4) despite maximally tolerated anti-angina medical therapy. All patients were evaluated by the local Heart Team and considered not amenable to percutaneous or surgical revascularization procedures. After the Heart Team evaluation patients were qualified for the procedure or Coronary Sinus Reducer implantation unless they meet one of the exclusion criteria. Initial patient evaluation (prior to device implantation) consists of past medical history, actual clinical assessment with an evaluation of CCS class, Seattle Angina Questionnaire - 7 items (SAQ-7) scores, 6-min walk distance (6-MWT) test, and echocardiography. First, a follow-up visit is scheduled 1 month after the implantation procedure than the follow-up is planned twice a year.