The diagnostic value of TEE was significantly higher than that of TTE in the examination of small vegetation of infective endocarditis, the size and number and complicated abnormality of septal defects, intramural thrombus and large aneurysm, etc. 对感染性心内膜炎小赘生物的检出、间隔缺损部位、数目、合并畸型、心腔内血栓、大动脉瘤等TEE的诊断价值明显高于TTE。