<prompt> For a patient, of CRF which of the following would be specific indication to sta dialysis?BUN rises to 90 mgdlUrine output falls to 10 mlhHematocrit falls to 30Pericardial friction rub  <response>: Pericarditis in renal failure acute or chronic is an indication to initiate hemodialysis, because untreated uremic pericarditis may progress to pericardial tamponade 