Characteristics of the study, trial characteristics and protocols.

Abbreviations: ACS, acute coronary syndrome; CAG, coronary angiography; CIN, contrast induced nephropathy; CKD, chronic kidney disease; CrCl, creatinine clearance; DM, diabetes mellitus; eGFR, estimated glomerular filtration rate; LDL, low-density lipoprotein; LVEF, left ventricular ejection fraction; NAC, N-acetylcystein; NR, not reported; NS, normal saline (isotonic saline, 0.9%); NSTEMI, non ST-segment elevation myocardial infarction; PCI, percutaneous coronary intervention; SCr, serum creatinine; STEMI, ST-segment elevation myocardial infarction; UA, unstable angina.Characteristics of the study, trial characteristics and protocols.