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Uric acid increases the incidence of ventricular arrhythmia in patients with left ventricular hypertrophy
Shinya Yamada1, Hitoshi Suzuki, Masashi Kamioka
1Department of Cardiology and Hematology, Fukushima Medical University.
Insights
Elevated serum uric acid (UA) levels are linked to ventricular tachycardia (VT) in patients with left ventricular hypertrophy (LVH). Higher UA levels independently predict VT occurrence, suggesting UA as a useful marker for arrhythmias.
Area of Science:
- Cardiology
- Nephrology
- Internal Medicine
Background:
- Elevated uric acid (UA) is associated with left ventricular hypertrophy (LVH).
- LVH increases the risk of ventricular tachycardia (VT) and sudden cardiac death.
- The relationship between serum UA levels and VT occurrence in LVH patients is unclear.
Purpose of the Study:
- To investigate the association between serum UA levels and VT in patients with LVH.
- To determine if UA is an independent predictor of VT in this population.
Main Methods:
- 167 LVH patients (mean age 67.4 years) were analyzed using 24-hour Holter ECG.
- Patients were categorized into VT (n=27) and Non-VT (n=140) groups.
- Echocardiographic, renal function (BUN, creatinine, eGFR), and serum UA levels were compared.
Main Results:
- No significant differences in echocardiographic parameters between groups.
- VT group showed significantly higher BUN and UA levels (p < 0.01).
- VT group had significantly lower eGFR (p < 0.01).
- Multivariate analysis identified UA level as an independent predictor of VT (OR 1.61, p < 0.01).
Conclusions:
- Serum UA level is a significant independent predictor of VT in patients with LVH.
- Higher UA levels may indicate an increased risk of ventricular arrhythmias.
- UA can serve as a valuable predictive marker for arrhythmias in LVH patients.
Backgrounds:
Elevated uric acid (UA) level is reported to be related to the development of left ventricular hypertrophy (LVH) which is associated with high incidence of ventricular tachycardia (VT) and sudden cardiac death. However, little is known about the association between serum UA levels and the occurrence of VT. Thus, we examined the relationship between serum UA levels and the appearance of VT in patients with LVH.
Methods:
The study subjects consisted of 167 patients (110 males, mean age 67.4 ± 12.7 years) with LVH detected by echocardiography. These patients were divided into two groups based on whether VT was presented (defined by more than 5 beats, n = 27) or not (n = 140) by 24-hour Holter ECG monitoring. Left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter (LVDd), the E/A ratio and deceleration time of transmitral flow velocity were assessed by echocardiography in each group. In addition, blood urea nitrogen (BUN), creatinine, estimated glomerular filtration rate (eGFR), sodium, potassium, hemoglobin, total bilirubin and UA were compared in each group.
Results:
Echocardiographic findings did not show the difference between the two groups. However, BUN and UA levels in the VT group were significantly higher than those in the Non-VT group (p < 0.01). eGFR was significantly lower in the VT group than that in the Non-VT group (p < 0.01). A multivariate logistic regression analysis identified the UA level as an independent predictive factor for the occurrence of VT (odds ratio 1.61, 95% confidence interval 1.1-2.2, p < 0.01).
Conclusions:
These results suggest that serum UA level is a useful marker for predicting ventricular arrhythmias in patients with LVH.
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