I have stage 3b kidney failure, I am 70 years old. In 5 yrs. ago my gfr was 55, has decreased to 44 now. My kidney failure is the result of uncontrollable blood pressure over 30 yrs. Is this decline in gfr normal? The decline is the result of a bp crisis in February ended up in hospital. I have nephrologist who says kidney failure is stable. I am concerned that the decline is happening so fast. Has this happened to anyone else?