结论：彩色多普勒超声对椎动脉走行变异是一种理想的无创性诊断方法。
Conclusion: Color Doppler flow imaging is a useful noninvasive method for the diagnosis of vertebral artery course variation.
结论：熟悉喉返神经的解剖和变异，行甲状腺切除术时解剖显露喉返神经可以降低喉返神经损伤的发生率。
Conclusions: the familiarity of the anatomy and variation of RLN, and the exposure of RLN in thyroid operation, can reduce the rate of the RLN injury.
结论：对心肌梗死患者及早行pci，可使患者的心率变异指标显著增加，明显改善患者预后。
Conclusion: Early PCI in AMI patients can increase the heart rate variance indexes significantly and improve the prognosis dramatically.
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