Cardiac Resynchronization Therapy prevents progression of renal failure in heart failure patients
Vinodh Jeevanantham1, Mohit Turagam2, David Shanberg1
1University of Kansas Medical Center, Kansas City, KS, USA.
Insights
Cardiac resynchronization therapy (CRT) stabilized renal function in heart failure patients, particularly improving advanced chronic kidney disease (CKD). Stable or improved kidney function after CRT predicted lower mortality.
Area of Science:
- Cardiology
- Nephrology
- Medical Devices
Background:
- Cardiac resynchronization therapy (CRT) is used for heart failure, but its long-term effects on renal function are not fully understood.
- Assessing CRT's impact on kidney function is crucial for managing heart failure patients with co-existing renal disease.
Purpose of the Study:
- To evaluate the long-term effects of CRT on renal function in heart failure patients.
- To determine the association between changes in renal function post-CRT and patient mortality.
Main Methods:
- Retrospective review of 588 patients who underwent CRT implantation between 2000-2009.
- Renal function (GFR) and cardiac function (LVEF) assessed short-term (≤6 months) and long-term (>6 months) post-CRT.
- Chronic kidney disease (CKD) staging based on KDOQI guidelines.
Main Results:
- No significant overall decline in Glomerular Filtration Rate (GFR) was observed post-CRT.
- Significant renal function improvement noted in patients with advanced CKD (stage 4 and 5).
- Stable or improved GFR independently predicted lower mortality.
Conclusions:
- CRT is associated with renal function stabilization in severe left ventricular dysfunction.
- CRT can improve renal function in patients with stage 4 and 5 CKD.
- Enhanced renal function post-CRT correlates with reduced mortality risk.
Background:
The goal of this study is to assess the effect of cardiac resynchronization therapy (CRT) over time on renal function and its impact on mortality. The effect of CRT on renal function in patients with heart failure is not well understood.
Methods:
All patients who underwent CRT implantation at University of Kansas between year 2000 and 2009 were reviewed and patients who had pre and post CRT renal function studied were included in our study. Stages of chronic kidney disease (CKD) were defined based on Kidney Disease Outcome Quality Initiative (KDOQI) guidelines. The effect of CRT on renal and cardiac function were studied at short term (≤6 months post implantation) and long term (>6 months).
Results:
A total of 588 patients with mean age of 67 ± 12 yrs were included in the study. CRT responders (defined by increase in LVEF ≥ 5%) were 54% during short term follow-up and 65% on long term follow-up. When compared to baseline, there was no significant deterioration in mean Glomerular Filtration Rate (GFR) during follow up. When analyzed based on the stages of CKD, there was significant improvement of renal function in patients with advanced kidney disease. Multivariate logistic regression analysis showed that stable GFR or an improvement in GFR independently predicted mortality after adjusting for co-morbidities.
Conclusions:
CRT was associated with stabilization of renal function in patients with severe LV dysfunction and improvement in stage 4 and 5 CKD. Improved renal function was associated with a lower mortality.
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