Objective:To understand the common types of multi-mechanism tachycardias(MMT),explore the diagnostic methods and criterias and the strategy of radiofrequency current catheter ablation (RFCA) of MMT.

• 周荣华,邢海燕,王玮,葛永贵,王家宁,党书毅,王崇全,涂远超,许大国,张群林目的：了解多机制心动过速(MMT)并存的常见类型，探讨其诊断思路、诊断标准及射频消融术(RFCA)对策。