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Published on: February 14, 2017
Gout, not hyperuricemia alone, impairs left ventricular diastolic function
Jing-Chi Lin1,2, Chun-Liang Lin3,4, Mien-Cheng Chen5
1Division of Allergy and Immunology and Rheumatology, Chang Gung Memorial Hospital, Chiayi, Taiwan. jingchilin@gmail.com.
Insights
Gout is linked to left ventricular diastolic dysfunction and enlarged left atrial volume, independent of hyperuricemia alone. This study highlights gout
Area of Science:
- Cardiology
- Metabolic Disorders
- Rheumatology
Background:
- Gout, a metabolic disorder marked by hyperuricemia and inflammation, is associated with cardiovascular disease and left ventricular (LV) remodeling.
- The specific impact of gout on LV diastolic function remains understudied, with limited data on hyperuricemia as the sole contributor to cardiac remodeling.
- Investigating the relationship between gout and LV diastolic function is crucial for understanding cardiovascular risks in gout patients.
Purpose of the Study:
- To examine the effects of gout on left ventricular (LV) diastolic function.
- To determine if gout, beyond hyperuricemia, is associated with cardiac remodeling and diastolic dysfunction.
- To assess the relationship between serum uric acid levels, gout diagnosis, and echocardiographic parameters of cardiac function.
Main Methods:
- 173 patients were stratified into three groups based on serum uric acid (UA) levels.
- All participants underwent comprehensive Doppler-echocardiography to evaluate LV and left atrial (LA) volumes and function.
- Comparison of diastolic function parameters and LV remodeling indicators between tertiles of UA levels and between gout and non-gout groups.
Main Results:
- No significant differences in LV diastolic parameters were observed across serum UA tertiles.
- Gout patients exhibited significantly greater LV end-systolic dimensions, LV mass index, and E/Em ratio compared to non-gout patients.
- Patients with gout showed a higher prevalence of moderate to severe LV diastolic dysfunction and larger maximal left atrial volume index (LAVi).
Conclusions:
- Gout, independent of hyperuricemia levels alone, is significantly associated with impaired LV diastolic function.
- Gout is linked to left atrial enlargement, indicating potential adverse cardiac remodeling.
- The findings underscore the importance of considering gout as an independent risk factor for cardiac dysfunction.
Introduction:
Gout is a common metabolic disorder characterized by hyperuricemia and chronic inflammation. Previous studies show that hyperuricemia accelerates the occurrence and worsening of cardiovascular disease due to LV remodeling. However, it is still unclear whether hyperuricemia is the sole contributor to organic heart remodeling in patients with gout. In addition, there is a paucity of data regarding the association between LV diastolic function and gout. The objective of this study was to investigate the effects of gout on LV diastolic function.
Methods:
A total of 173 patients were divided into tertiles based on the following serum uric acid (UA) levels: (1) serum UA ≤ 6.5 mg/dL (n = 54), (2) serum UA >6.5 to ≤8.5 mg/dL (n = 59), and (3) serum UA > 8.5 mg/dL (n = 60).Patients underwent a comprehensive Doppler-echocardiography examination to evaluate LV volume, systolic and diastolic function, and left atrial (LA) volume.
Results:
LV diastolic parameters, including diastolic peak early transmitral flow velocity (E), late transmitral flow velocity (A), E/A, peak early diastolic mitral annular velocity (Em), late diastolic annular velocity (Am), Em/Am, E/Em, maximal LA volume index (LAVi) and prevalence of moderate to severe LV diastolic dysfunction were not significantly different between the three groups. Among the population being studied, 108 individuals received a gout diagnosis. Gout patients had greater LV end-systolic dimensions (27.08 ± 4.38 mm, p = 0.006), higher LV mass index (107.18 ± 29.51 g/m2, p < 0.001), higher E/Em (10.07 ± 2.91, p = 0.008), and larger maximal LAVi (16.96 ± 7.39 mL/m2, p < 0.001) than patients without gout. The prevalence of moderate to severe LV diastolic dysfunction was higher in patients with gout (23%, p = 0.02).
Conclusions:
Gout, not hyperuricemia alone, is associated with LV diastolic dysfunction and LA volume enlargement.
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