Department of Cardiovascular Medicine;
Tsuchiura Kyodo General Hospital;
Ibaraki 300-0028;
Japan;
Department of Interventional Cardiology;
Tokyo Medical and Dental University;
Tokyo 113-8519;
Japan;
Department of Cardiovascular Medicine;
Tokyo Medical and Dental University;
Tokyo 113-8519;
Japan;
Coronary artery disease; Kidney injury; Contrast media; Dextran; Optical coherence tomography; Renal insufficiency;