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目的 观察多巴酚丁胺负荷超声心动图对诊断儿童病毒性心肌炎的能力。方法 31例儿童患者 ,用低剂量〔5～2 0 ︼g/ (kg· min)〕多巴酚丁胺负荷超声心动图 ,观察心肌收缩功能的变化。结果 1 7例左室心肌收缩功能减低 ,室壁收缩期增厚率、左室短轴缩短率、射血分数、每搏量、心输出量均下降 ,即用负荷试验诊断病毒性心肌炎 1 7例 ,排除心肌炎 1 3例 ,﹀受体功能亢进 1例。结论 多巴酚丁胺负荷试验检测心肌收缩功能减低 ,对诊断病毒性心肌炎有重要作用
Objective To observe the ability of dobutamine stress echocardiography to diagnose viral myocarditis in children. Methods Twenty - one children undergoing echocardiography with low dose of dobutamine stress (5 ~ 20 kg / min) were used to observe the changes of myocardial contractile function. Results Seventeen cases of left ventricular myocardial systolic dysfunction, ventricular wall thickening rate, shortening of left ventricular shortening, ejection fraction, stroke volume, cardiac output decreased, that is, the use of load test diagnosis of viral myocarditis 1 7 Cases, excluding myocarditis in 13 cases, ﹀ receptor hyperfunction in 1 case. Conclusions Dobutamine stress test can reduce myocardial contractile function and play an important role in the diagnosis of viral myocarditis