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Cardiac conduction defects associated with aortic and mitral valve calcification in dialysis patients
S W Shurmur1, J A D'Elia, R E Gleason
1Department of Cardiology, New England Deaconess Hospital, Boston, Massachusetts.
Insights
Mitral valve calcification in dialysis patients is linked to heart conduction defects but does not impact 12-month survival. Echocardiography and ECG data revealed these associations in patients undergoing dialysis.
Area of Science:
- Cardiology
- Nephrology
- Medical Imaging
Background:
- Calcification of heart valves, particularly the mitral valve and mitral annulus, is a known complication in patients with chronic kidney disease.
- Dialysis patients often have multiple comorbidities, increasing the risk of cardiovascular complications.
Purpose of the Study:
- To investigate the prevalence of aortic and mitral valve calcification in dialysis patients using echocardiography.
- To correlate valve calcification with electrocardiogram (ECG) findings and 12-month survival rates.
Main Methods:
- Echocardiography was used to assess aortic and mitral valve or annular calcification in 66 dialysis patients.
- 24-hour ambulatory and resting ECG data were collected and analyzed.
- 12-month survival data was correlated with echocardiographic and ECG findings.
Main Results:
- Mitral valve or annular calcification was confirmed to be associated with cardiac conduction defects.
- Patients with mitral calcification showed a higher prevalence of first-degree atrioventricular block and bundle branch block.
- Despite the presence of conduction defects and advanced age, mitral valvular calcification did not negatively impact 12-month survival.
Conclusions:
- Mitral valve or annular calcification is common in dialysis patients and is associated with conduction abnormalities.
- The presence of mitral calcification does not appear to reduce short-term survival in this patient population.
- Further research is warranted to explore long-term outcomes and potential interventions.
Abstract:
The prevalence of aortic valve and mitral valve or mitral annular calcification by echocardiography was studied in 66 dialysis patients and correlated with results of 24-h ambulatory and resting ECG data and 12-month survival. The well-known association of mitral valve or mitral annular calcification with cardiac conduction defects was confirmed. Those patients with mitral valve or mitral annular calcification demonstrated a higher prevalence of first-degree atrioventricular block and bundle branch block. Despite advanced age and these conduction defects, those patients with mitral valvular calcification did not show decreased survival at 12 months.