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1 对象和方法对104例(男54例,女50例)2～15岁正常儿童进行经食管心房调搏,检查前未应用任何药物。采用两种方法:①连续心房刺激法(CAP):以比基础心率稍快(≤10次/分)的频率定数8次刺激心房,重复测定4次。②分级递增法(SIP):以高于基础心率10次/分的频率开始调搏并以15次/分递增,每次持续30 s,共调搏4～5次。仪器为FD-IA心脏刺激仪,刺激脉宽8
1 Subjects and Methods 104 cases (54 males and 50 females) normal children aged 2 to 15 years were transesophageal atrial pacing, before the test did not use any drugs. There are two methods: ① continuous atrial stimulation (CAP): atrial fibrillation is fixed 8 times at a fixed frequency (≤10 times / min) than the basal heart rate, and the test is repeated 4 times. (2) Graded Ascending (SIP): Pacemaker was started at a frequency higher than the basal heart rate of 10 beats / min and incremented at a rate of 15 beats / min for 30 s each for a total of 4 to 5 beats. Instrument for the FD-IA cardiac stimulator, stimulus pulse width 8