Campbell, NG; Allen, E; Sanders, J; Swinson, R; Birch, S; Sturgess, J; Al-Subaie, N; ... O'Brien, B; + view all Campbell, NG; Allen, E; Sanders, J; Swinson, R; Birch, S; Sturgess, J; Al-Subaie, N; Elbourne, D; Montgomery, H; O'Brien, B; - view fewer (2017) The impact of maintaining serum potassium ≥3.6 mEq/L vs ≥4.5 mEq/L on the incidence of new-onset atrial fibrillation in the first 120 hours after isolated elective coronary artery bypass grafting - study protocol for a randomised feasibility trial for the proposed Tight K randomized non-inferiority trial. Trials , 18 (1) , Article 618. 10.1186/s13063-017-2349-x.