Conclusion CPVA guided by 3-d mapping system can be performed in CAF patients with an acceptable efficacy, but safety need to be improved.
结论三维标测系统指导下环肺静脉线性消融治疗慢性房颤疗效较好，安全性有待进一步提高。
First of all, it presents the importance of risk assessment on the electric power communication system due to the system's important role and safety need.
首先，阐述了通信系统在电力生产中的重要地位和安全需求，因此对其进行风险评估是很有必要的。
Since the aviation safety need dynamic management, the construction and application of the aviation safety risk management mode based on the problem management is very useful.
航空安全需要动态管理，因此构建并实施基于问题管理的航空安全风险管理模式就非常有意义。
Since the aviation safety need dynamic management, the construction and application of the aviation safety risk management mode based on the problem management is very useful.
航空安全需要动态管理，因此构建并实施基于问题管理的航空安全风险管理模式就非常有意义。
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