目的：用东冠注射液声学造影剂进行经静脉左心室声学造影(LCE)，探讨其在超声运动试验中的应用价值。
Objective: To evaluate the effects of left ventricle contrast echocardiography (LCE) by intravenous injection of Dongguan on treadmill test.
目的：用东冠注射液声学造影剂进行经静脉左心室声学造影(LCE)，探讨其在超声运动试验中的应用价值。
Objective: To evaluate the effects of left ventricle contrast echocardiography (LCE) by intravenous injection of Dongguan on treadmill test.
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