text: 这一基质可以是旁道（可引起房室折返性心动过速或预激综合征）；心房或心室的异常兴奋灶（房性异位性心动过速或室性心动过速）；心房或心室的一个瘢痕，形成折返性心动过速环路的一个成分（房扑或室性心动过速）；或房室结双径路（房室结折返性心过动速）。
entities.entity: 旁道
entities.label: bod
entities.entity: 房室折返性心动过速或预激综合征
entities.label: dis
entities.entity: 心房
entities.label: bod
entities.entity: 心室
entities.label: bod
entities.entity: 房性异位性心动过速
entities.label: dis
entities.entity: 室性心动过速
entities.label: dis
entities.entity: 心房
entities.label: bod
entities.entity: 心室
entities.label: bod
entities.entity: 瘢痕
entities.label: sym
entities.entity: 折返性心动过速
entities.label: dis
entities.entity: 房扑或室性心动过速
entities.label: dis
entities.entity: 房室结双径路
entities.label: dis
entities.entity: 房室结折返性心过动速
entities.label: dis