text: 图9-11图示左侧游离壁旁道（AP）激动自心室经旁道逆传回心房，再经房室结下传至心室，如此周而复始，形成旁道介导的房室折返性心动过速图9-12消融导管到达相应旁道位置，释放能量，旁道破坏，该旁道介导的房室折返性心动过速治愈图9-13本图箭头内区域为射频电流在组织内产生边界清楚的损伤区，下方为射频消融导管头端（二）常见室上性心动过速一些常见室上性心动过速（supraventriculartachycardia，SVT）的自然史：室上性心动过速的自然史与患儿的发病年龄及心律失常的机制有关。
entities.entity: 心室
entities.label: bod
entities.entity: 旁道
entities.label: bod
entities.entity: 心房
entities.label: bod
entities.entity: 房室结
entities.label: bod
entities.entity: 旁道介导的房室折返性心动过速
entities.label: dis
entities.entity: 消融导管
entities.label: equ
entities.entity: 旁道介导的房室折返性心动过速
entities.label: dis
entities.entity: 射频消融导管
entities.label: equ
entities.entity: 常见室上性心动过速
entities.label: dis
entities.entity: 常见室上性心动过速
entities.label: dis
entities.entity: supraventriculartachycardia
entities.label: dis
entities.entity: SVT
entities.label: dis
entities.entity: 室上性心动过速
entities.label: dis
entities.entity: 心律失常
entities.label: dis