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Cardiovascular disease and mortality in ESRD
1The Division of Nephrology, the Health Sciences Centre, Memorial University, St John's, Newfoundland, Canada. rn-foley@hotmail.com
Journal of Nephrology
|November 27, 1998
Summary
Cardiovascular disease is a major threat for End-Stage Renal Disease (ESRD) patients, with risk factors like hypertension, anemia, and hypoalbuminemia significantly increasing cardiac complications and mortality.
Area of Science:
- Nephrology
- Cardiology
- Internal Medicine
Background:
- Cardiovascular disease (CVD) is the leading cause of mortality in End-Stage Renal Disease (ESRD) patients, with risks significantly elevated compared to the general population.
- Cardiac failure and ischemic heart disease are particularly lethal in ESRD, often mediated by pre-existing left ventricular (LV) abnormalities present in most dialysis patients at initiation.
- Classical risk factors show inconsistent associations with cardiac outcomes in ESRD, suggesting unique ESRD-related factors are crucial.
Purpose of the Study:
- To investigate major risk factors for cardiovascular disease in patients initiating dialysis.
- To determine the impact of ESRD and dialysis therapy on left ventricular abnormalities and cardiac outcomes.
- To identify treatable factors that could reduce the burden of cardiovascular disease in ESRD.
Main Methods:
- Prospective 10-year study of 433 patients starting dialysis.
- Assessment of cardiovascular risk factors including hypertension, anemia, and hypoalbuminemia.
- Evaluation of left ventricular abnormalities (LVH, LV dilatation) and their association with cardiac events and mortality.
Main Results:
- Hypertension, anemia, and hypoalbuminemia were identified as major risk factors for de novo ischemic heart disease, cardiac failure, and death.
- Left ventricular abnormalities were common at dialysis initiation, predicted future cardiac events and death, and tended to worsen during dialysis.
- Improvement in LV abnormalities after transplantation suggested a cardiotoxic uremic environment.
Conclusions:
- Cardiovascular disease in ESRD is multifactorial, with ESRD-specific factors like hypertension, anemia, and hypoalbuminemia playing significant roles.
- Left ventricular abnormalities are critical predictors of poor cardiac outcomes in dialysis patients.
- Targeting these modifiable risk factors offers potential to significantly reduce cardiovascular morbidity and mortality in ESRD.