My mother is 85 with stage 3 heart failure. HFrEF She also has a left bundle branch block with some leaky heart valves. I was looking into crt for her. She has shortness of breath mainly and is starting to get more tired when she walks. I was wondering if any one has a similiar condition and had CRT. I was trying to see how successful the procedure is in improving symptoms, and how difficult going through the procedure is, and if there are complications. Any comments appreciated.