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用食道调搏（TEPA）S1S2程控刺激检查60名在校生，S1S1周期选用多种且同一S1S1周期时，S2早搏刺激作正、反两次扫描。结果房室结双径路（DAVNP）18例（30％），三径路（TAVNP）8例（13.3％）。S1S1周期以600ms检出率最高（分别为总检出数的66．6％和75％）。全组未见心房回波及诱发出房室结折返性心动过速（AVNRT）。
Sixty students were examined by TEPA S1S2 program-controlled stimuli. S2S pre-stimulation was used for both positive and negative scans when multiple S1S1 cycles were used and the same S1S1 cycle was used. Results 18 cases of DAVNP (30%) and 8 cases of TAVNP (13.3%) were found. The S1S1 cycle has the highest detection rate at 600ms (66.6% and 75% of the total number of tests, respectively). The whole group showed no atrial echo and induced atrioventricular nodal reentrant tachycardia (AVNRT).