I have a left bundle branch blockage. They implanted a Cardiac Resynchronization Therapy Defibrillator (it incorps. both pacemaker & defibulation functions) my only symptoms were shortness or breath but I am also an asthmatic & my blood pressure was borderline low so who knows how long i had this condition. The ICD has been working well. My heart muscle is damaged & if the ICD doesn't do what it needs to do (which it does) I will need a heart transplant. I am presently taking a total of 160mg "water pills" 80mg klor-con & my potassium is still a bit low. Just read that this combination is not a good one, but I need the water pills because I continue to retain water but with the same token it can also hurt me. Don't know what to do.