CI-AKI, contrast-induced acute kidney injury; CAD, coronary artery disease; STEMI, ST-segment elevation myocardial infarction; NSTEMI, non–ST-segment myocardial infarction; NSAIDs, non-steroidal anti-inflammatory drugs; ACEIs, angiotensin-converting enzyme inhibitors; ARBs, angiotensin receptor blockers; PCI, percutaneous coronary intervention. The gene discussed is ACE; the disease is coronary artery disorder.