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[Microalbuminuria. Signification and value]
1Service de Médecine B, Centre hospitalier universitaire, Angers.
Abstract:
The term microalbuminuria means a slightly elevated urinary albumin level. It indicates an abnormal passage of plasma albumin into urine through the glomerular filter. Its prognostic significance was first established in diabetics: in insulin-dependent diabetics microalbuminuria predicts a renal disease, while in non-insulin-dependent diabetics it predicts an excessive cardiovascular mortality. Recently, microalbuminuria has been shown to predict cardiovascular morbidity and mortality in the general population, especially in elderly subjects. Pathogenetic mechanisms common to both atherosclerosis and renal failure may account for the predictive value of microalbuminuria in the above-mentioned conditions.
Insights
Microalbuminuria, a marker of kidney damage, predicts cardiovascular disease in diabetics and the general population. Early detection of elevated urinary albumin levels is crucial for cardiovascular risk assessment.
Area of Science:
- Nephrology
- Cardiology
- Diabetology
Context:
- Microalbuminuria signifies elevated urinary albumin, indicating glomerular filter dysfunction.
- Its prognostic value is well-established in diabetes mellitus for predicting renal disease and cardiovascular mortality.
- Recent findings highlight its predictive role in cardiovascular morbidity and mortality in the general population, particularly the elderly.
Purpose:
- To summarize the prognostic significance of microalbuminuria.
- To explore its predictive value in diabetic and non-diabetic populations.
- To discuss potential shared pathogenetic mechanisms with atherosclerosis and renal failure.
Summary:
- Microalbuminuria, defined as a slightly elevated urinary albumin level, indicates impaired kidney filtration.
- In diabetics, it predicts renal disease (Type 1) or cardiovascular mortality (Type 2).
- In the general population, especially the elderly, it predicts cardiovascular morbidity and mortality, likely due to shared pathways with atherosclerosis and renal failure.
Impact:
- Microalbuminuria serves as a critical early biomarker for cardiovascular risk assessment across diverse populations.
- Understanding its role can lead to improved preventative strategies for cardiovascular and renal diseases.
- This highlights the interconnectedness of renal health and cardiovascular outcomes.