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对230例各类早搏儿进行系统二维心脏超声和多普勒心脏超声检查。舒张末期左心室内径（LVDDd）、收缩期左心室内径（LVSd）、心肌炎早搏组（除1～6a）均明显高于单纯性早搏组（P＜0．05）。左心室内径增大检出率，心肌炎早搏组大于单纯性早搏组，分别为21．52％和1．39％。认为单纯性早搏以功能性居多。
Systemic two-dimensional echocardiography and Doppler echocardiography were performed on 230 premature infants. Left ventricular end-diastolic diameter (LVDDd), systolic left ventricular diameter (LVSd) and myocarditis premature beats group (except 1 ~ 6a) were significantly higher than that of simple premature beats group (P <0.05). The detection rate of left ventricular diameter increased, myocarditis premature beats group than the simple premature beats group, respectively 21.52% and 1.39%. Simple premature beats are mostly functional.