现代医学认为，脚是人体的“第二心脏”，脚有无数的神经末稍与大脑紧密相连，与人体健康息息相关。
Modern medicine thinks, the foot is the body of the "second heart", feet have numerous nerve endings and the brain are closely linked, and human health are closely related.
结果：进行心脏彩超检查的原因以心脏杂音、紫绀、宫内窘迫或新生儿窒息、呼吸急促、肺动脉瓣第二心音亢进最常见。
Results: Their main cause to colour Doppler echocardiography were murmur, cyanosis, panting, asphyxia, feeding-difficulty, Loud pulmonary valve second heart sound.
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