RecruitingDevice studyRemote Ischemic Preconditioning for Renal and Cardiac Protection in Congestive Heart Failure (RICH) TrialThis is a prospective, double-blind, sham-controlled, multicenter, randomized clinical trial is to study the effects of remote ischemic preconditioning on contrast-associated acute kidney injury, functional capacity, and major adverse kidney events in in patients with congestive heart failure undergoing cardiac catheterization and/or percutaneous coronary intervention.