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Beyond serum creatinine: defining the patient with renal insufficiency and why?
1Divisions of Cardiology, Nutrition, and Preventive Medicine, William Beaumont Hospital, Royal Oak, MI, USA.
Insights
Chronic kidney disease significantly impacts outcomes after percutaneous coronary intervention. Estimated glomerular filtration rate (eGFR) is crucial for assessing renal dysfunction and predicting adverse cardiovascular events.
Area of Science:
- Nephrology
- Cardiology
- Interventional Cardiology
Background:
- Chronic kidney disease (CKD) is a primary predictor of adverse outcomes following percutaneous coronary intervention (PCI).
- Cardiovascular outcomes are significantly worse in patients with reduced renal function.
- Radiocontrast nephropathy (RCN) is a major concern in patients undergoing PCI.
Purpose of the Study:
- To highlight the critical role of chronic kidney disease in predicting outcomes after percutaneous coronary intervention.
- To emphasize the importance of estimated glomerular filtration rate (eGFR) in assessing renal dysfunction.
- To explore the pathobiology of radiocontrast nephropathy and its link to cardiovascular outcomes.
Main Methods:
- Review of existing literature on cardiovascular outcomes in patients undergoing PCI with varying degrees of renal function.
- Analysis of the threshold for estimated glomerular filtration rate (eGFR) associated with adverse events.
- Discussion of the diagnostic accuracy of eGFR calculation versus serum creatinine alone.
Main Results:
- A reduced eGFR (below 60 mL/min/1.73 m2) is a critical threshold for adverse cardiovascular events, including restenosis, myocardial infarction, heart failure, and cardiovascular death.
- Serum creatinine alone is insufficient for accurately assessing renal dysfunction; eGFR calculation is essential.
- The pathogenesis of RCN involves complex vascular pathobiology linking renal and cardiovascular health.
Conclusions:
- CKD is the most significant factor influencing short- and long-term outcomes post-PCI.
- Accurate assessment of renal function using eGFR is vital for risk stratification and management of patients undergoing PCI.
- Understanding the interplay between renal and cardiovascular disease is crucial for improving patient outcomes.
Abstract:
Chronic kidney disease is the most important factor in predicting adverse short- and long-term outcomes after percutaneous coronary intervention. Most studies of cardiovascular outcomes have found that a break point for the development of radiocontrast nephropathy (RCN), later restenosis, recurrent myocardial infarction, congestive heart failure, and cardiovascular death, occurs below an estimated glomerular filtration rate (eGFR) of 60 mL/min/1.73 m2, which roughly corresponds to a serum creatinine (Cr) of > 1.5 mg/dL in the general population. Renal dysfunction is accurately recognized by calculating the eGFR from the age, serum creatinine, gender, race, and weight, and not from the serum creatinine alone. The pathogenesis of RCN goes beyond serum Cr and involves a unique vascular pathobiology that interrelates both the renal and cardiovascular disease outcomes.