The 16 case of PAF (51.6%) can be identified the sick sinus syndrome (SSS) from the causes of SNRT, CSNRT and SACT; 8 case of PAF were diagonosed sinus node dysfunction (25.8%), and one case of PAF was concealed accessory pathway (3.23%) by EAP.

• 2例因心率过快停止测试，余31例根据窦房结恢复时间(SNRT)、校正窦房结恢复时间(CSNRT)、窦房传导时间(SACT)可明确诊断病态窦房结综合征16例(51.；6%25)窦房结功能低下8例(25