My mother has congestive
heart failure, pacemaker/defib, stent, only one working valve. They were not able to place a 2nd stent due to blockage. They did not do open heart surgery due to high risk and because her size (very thin). Recently, she was hospitalized for low b.p. , dehydration, and kidney function, low urine output, UTI. They replaced fluids and removed a lot of the b.p. lowering meds, including isosorbide, due to the concern of the low b.p.