(How) Do We Theorize?: A Focused Mapping Review and Synthesis of Theoretical Nursing Research in the German-Speaking Area.

There are increasing discussions on theory dynamics in nursing research. We aimed at mapping the theoretical publication output by nursing researchers from the European German-speaking area. We conducted a focused mapping review and synthesis, focusing on nursing journals articles with a theory-related aim.

Effect of perioperative levosimendan administration on postoperative N-terminal pro-B-type natriuretic peptide concentration in patients with increased cardiovascular risk factors undergoing non-cardiac surgery: protocol for the double-blind, randomised, placebo-controlled IMPROVE trial.

Introduction: Elevated N-terminal pro-brain natriuretic peptide (NT-pro-BNP) after non-cardiac surgery is a strong predictor for cardiovascular complications and reflects increased myocardial strain. NT-pro-BNP concentrations significantly rise after non-cardiac surgery within the first 3 days. Levosimendan is a potent inotropic drug that increases calcium sensitivity to cardiac myocytes, which results in improved cardiac contractility that last for approximately 7 days.