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Published on: February 16, 2011
Rapid decline in renal function after acute myocardial infarction
Yusuke Mashima1, Tsuneo Konta, Kazunobu Ichikawa
1Department of Cardiology, Yamagata University School of Medicine, Yamagata, Japan.
Insights
Acute myocardial infarction significantly accelerates kidney function decline. Factors like age and proteinuria worsen renal function post-heart attack, necessitating close monitoring.
Area of Science:
- Cardiology
- Nephrology
- Renal Function
Background:
- Cardiac events, such as acute myocardial infarction, can have long-term systemic effects.
- Renal function is crucial for overall health and can be impacted by cardiovascular disease.
Purpose of the Study:
- To investigate the long-term impact of acute myocardial infarction on renal function.
- To identify factors influencing changes in estimated glomerular filtration rate (eGFR) after myocardial infarction.
Main Methods:
- A prospective study followed 137 patients with acute myocardial infarction for 1 year.
- Changes in eGFR were compared to matched controls, and regression analysis identified associated factors.
Main Results:
- Patients experienced a significant decrease in eGFR after myocardial infarction (73.7 to 64.7 ml/min/1.73 m2, p < 0.001).
- Factors negatively associated with eGFR change included older age, baseline eGFR, and proteinuria.
- Factors positively associated with eGFR change included ACE inhibitors or ARBs; cardiac damage severity and comorbidities were not significant predictors.
Conclusions:
- Renal function declines rapidly following acute myocardial infarction.
- Patient clinical characteristics influence the rate of renal decline.
- Close monitoring of renal function is recommended to prevent progression of both renal and cardiac disease.
Aim:
To investigate the long term effects of cardiac events on renal function, a prospective study of patients with acute myocardial infarction was conducted.
Methods:
A total of 137 patients with acute myocardial infarction were followed for 1 year. The change of estimated glomerular filtration rate (eGFR) in cardiac patients was compared with that in background-matched controls, and the factors associated with eGFR changes were analyzed.
Results:
The eGFR decrease was much larger after myocardial infarction, from 73.7 ± 1.9 ml/min/1.73 m2 (mean ± SEM) at baseline to 64.7 ± 1.7 at 1 year, (p < 0.001), compared with that of controls (from 72.8 ± 1.2 to 72.1 ± 1.3, p = 0.305). Multiple regression analysis showed that eGFR change was associated negatively with age, baseline eGFR, proteinuria, and positively with the administration of angiotensin converting enzyme inhibitors or angiotensin II receptor blockers, but not the severity of cardiac damage and comorbidities. Longitudinal analysis 1 year before and 2 years after myocardial infarction showed that eGFR decrease was larger during baseline and 6 months after the event (-7.0 ± 1.0).
Conclusions:
Renal decline was rapid after myocardial infarction and was affected by clinical characteristics of patients. Careful follow-up of renal function is recommended to prevent the progression of renal and cardiac disease.
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