Contrast Nephropathy Associated with Percutaneous Coronary Angiography and Intervention

Area of Science:

• Nephrology
• Radiology
• Cardiology

Background:

• Contrast nephropathy (CN) is acute kidney injury (AKI) developing within 72 hours of iodinated contrast medium (ICM) administration.
• Potential mechanisms include hyperviscosity, free radical formation, and altered oxygen supply/demand in the renal medulla.
• The causal relationship between ICM and AKI remains debated, despite identified risk factors.

Purpose of the Study:

• To review the mechanisms, risk factors, and prevention strategies for contrast nephropathy (CN).
• To clarify the association between iodinated contrast media (ICM) and acute kidney injury (AKI).
• To guide clinical practice regarding the use of ICM in patients with coronary artery disease.

Main Methods:

• Literature review of studies on contrast nephropathy (CN) and acute kidney injury (AKI).
• Analysis of mechanisms, risk factors, and preventative measures for CN.
• Evaluation of the impact of ICM on renal function in patients undergoing angiography.

Main Results:

• CN is defined as AKI occurring 24-72 hours post-ICM administration.
• Key prevention strategies include low-osmolal ICM, intravenous hydration, and statin therapy, particularly for chronic kidney disease patients.
• Risk mitigation allows for necessary procedures like coronary angiography in acute coronary syndromes.

Conclusions:

• Established prevention protocols for CN are effective.
• ICM administration can be managed safely in high-risk patients with appropriate precautions.
• Coronary angiography and intervention should not be withheld due to CN concerns when risk is mitigated.