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Published on: May 10, 2021
Cardiac valve calcification is associated with mortality in hemodialysis patients: a retrospective cohort study
Jiuxu Bai1, Xiaoling Zhang2, Aihong Zhang1
1Department of Blood Purification, General Hospital of Northern Theater Command, 83 Wen Hua Road, Shenyang, 110016, Liaoning, China.
Insights
Cardiac valve calcification (CVC) significantly increases mortality in maintenance hemodialysis (MHD) patients. Echocardiography can help stratify risk for these patients.
Area of Science:
- Nephrology
- Cardiology
- Clinical Research
Background:
- Cardiac valve calcification (CVC) is prevalent in end-stage renal disease (ESRD) patients.
- The impact of CVC on mortality in maintenance hemodialysis (MHD) patients requires further investigation.
Purpose of the Study:
- To investigate the association between CVC and all-cause and cardiovascular (CV) mortality in MHD patients.
- To assess the prognostic value of mitral valve calcification (MVC) and aortic valve calcification (AVC) in this population.
Main Methods:
- Retrospective cohort study of 434 MHD patients with echocardiography data.
- Comparison of baseline characteristics between CVC and non-CVC groups.
- Kaplan-Meier and multivariate Cox regression analyses for mortality outcomes.
Main Results:
- 27.2% had MVC, 31.8% had AVC.
- Patients with CVC exhibited significantly higher all-cause and CV mortality rates (log-rank P < 0.001).
- MVC and AVC were independent predictors of all-cause (HR: 1.517, P=0.010; HR: 1.433, P=0.028) and CV mortality (HR: 2.340, P<0.001; HR: 2.410, P<0.001).
Conclusions:
- Mitral and aortic valve calcification significantly elevate mortality risks in MHD patients.
- Echocardiography serves as a valuable tool for risk stratification in MHD patients with CVC.
Background:
Cardiac valve calcification (CVC) is common in end-stage renal disease (ESRD). We investigated the effect of CVC on all-cause and cardiovascular (CV) mortality in maintenance hemodialysis (MHD) patients.
Methods:
A retrospective cohort study was conducted on 434 hemodialysis patients who underwent echocardiography for qualitative assessment of valve calcification with complete follow-up data from January 1, 2014, to April 30, 2021. The baseline data between the CVC and non-CVC groups were compared. The Kaplan-Meier method was used to analyse all-cause and cardiovascular mortality. The association of CVC with all-cause and cardiovascular mortality was evaluated using multivariate Cox regression analysis.
Results:
Overall, 27.2% of patients had mitral valve calcification (MVC), and 31.8% had aortic valve calcification (AVC) on echocardiography. Patients with CVC showed significantly higher all-cause (log-rank P < 0.001) and cardiovascular (log-rank P < 0.001) mortality rates than patients without CVC. In multivariate regression analyses, MVC (HR: 1.517, P = 0.010) and AVC (HR: 1.433, P = 0.028) were significant factors associated with all-cause mortality. MVC (HR: 2.340, P < 0.001) and AVC (HR: 2.410, P < 0.001) were also significant factors associated with cardiovascular mortality.
Conclusions:
MVC and AVC increased the risk of all-cause and cardiovascular mortality in MHD patients. Regular follow-up with echocardiography could be a useful method for risk stratification in MHD patients.
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