Background: Kawasaki disease is an acute, systemic vasculitis that affects the coronary arteries. However, the relationship between myocardial fibrosis and Kawasaki disease has been completely unknown until now. We aimed to provide quantitative information about myocardial fibrosis using cardiac integrated backscatter in Han race Kawasaki disease patients. Methods: Ninety Kawasaki disease patients and 90 healthy control subjects were recruited. Based on Kawasaki disease status, the patients were categorized into 3 groups: acute, subacute, and convalescence phase. Based on coronary artery status, the Kawasaki disease patients were categorized into 3 groups: without coronary artery lesions, with coronary artery dilation, and with coronary artery aneurysms. All subjects underwent two-dimensional and Doppler examinations to measure clinical echocardiographic parameters. Myocardial fibrosis was detected with calibrated integrated backscatter imaging. Results: Left ventricle systolic functions were normal in both the Kawasaki disease and control participants. The myocardial calibrated integrated backscatter values of the left ventricles of the acute (p < 0.001), subacute (p < 0.001) and convalescence phase (p < 0.001) Kawasaki disease patients were significantly greater than those of the healthy controls. The left ventricle myocardial calibrated integrated backscatter values were significantly smaller in the Kawasaki disease patients without coronary artery lesions than in the Kawasaki disease patients with coronary artery dilations and coronary artery aneurysms in different phases. The left ventricle myocardial calibrated integrated backscatter results were positively correlated with coronary artery status in the acute (r = 0.331, p < 0.001), subacute (r = 0.456, p < 0.001) and convalescence phases (r = 0.407, p < 0.001) of Kawasaki disease. Conclusion: Our findings may suggest that myocardial fibrosis occurs during early episodes of Kawasaki disease given uncertainties that exist regarding correlations of calibrated integrated backscatter and myocardial fibrosis.
Introduction: The incidence of Kawasaki disease (KD) in China is increasing for years. The current coronary artery lesion (CAL) incidence is 5-10% in KD with intravenous immunoglobulin (IVIG) treatment. And the 10-20% KD patients still exhibit IVIG resistance. However, little clinical evidence on the occurrence of either CAL or IVIG resistance for big KD sample study in China during the past decade. Objective: In order to find clinical risk factors of CAL and IVIG resistance of KD in China. Methods: We retrospectively analyzed the clinical manifestations, laboratory results, treatment and complications of cardiac vascular of 602 KD cases from 2007 to 2012 admitted at Shanghai Children’s Hospital. The SAS 9.2 edition was used for statistical analysis. The mean ± standard deviation or the median were used for measurements. Case numbers and percentages were used for the count number. The t-test and the Mann-Whitney test were both used for mean comparisons. Single factor and multi-factor logistic regression analyses were used to analyze the risk factors. Results: 1. The KD gender male to female ratio was 1.85: 1. The KD median age was 2.0 years old (one month to 11.7 years old). 20.1% cases (121 of 602) exhibited CAL. There was no difference of CAL incidence between the gender (p=0.09). 2. The incidence of bright red cracked lips (p=0.001), peeling of the skin of the toes (p=0.021) and perianal skin peeling (p=0.031) are less in group with CAL. 3. Among the 602 cases, there were 525 cases that were sensitive to IVIG therapy. 100 of those cases had CAL with an incidence of 19.1%. Among the 26 IVIG resistance cases, there were 9 cases with CAL with an incidence of 34.6%, which was higher than the IVIG sensitive group (p=0.05). 4. ESR (p=0.014), CRP (p=0.017), PLT (p=0.003) and Hb (p=0.032) were much higher in the IVIG resistance group than the IVIG sensitive group, even though the IVIG resistance group started the IVIG treatment earlier (p=0.003). 5. Logistic regression analysis was conducted to show that GPT≥80IU/L was the independent risk factor of IVIG resistance, risk ratio was 2.945 (p=0.012) . Conclusion: This research suggests that risk factors of clinical evidence for IVIG resistance and CAL in KD.
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