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例1 患者女性,13岁,因患风湿热住院给予抗风湿治疗.无明显心悸、胸闷等症状,心电图、X线胸片及超声心动图等检查均正常.为了解窦房结及房室结传导功能行食管心房调搏.采用S_1S_2程控刺激法从舒张晚期进行递减扫描(步宽10ms,图1):当S_1-S_2为500ms时,S_2-R_2为180ms(B);当S_1-S_2为490ms时,S_2-R_2跳跃延长为310ms(C),前后相差130ms;诊断为房室结双径路.当程控扫描至360—350ms时房室传导中断(E、F),至340ms时传导又恢复(G),传导中断前后的QRS波群形态一致.诊断为慢径路内的空隙现象.
Example 1 Female patient, aged 13, hospitalized with rheumatic fever for rheumatoid arthritis without obvious heart palpitations, chest tightness and other symptoms, ECG, X-ray and echocardiography were normal.To understand the sinoatrial node and atrioventricular node Conduction function esophageal atrial pacing.Using S 1 S 2 program-controlled stimulation to scan from the late stage of diastole (step width 10 ms, Fig.1): S_2-R_2 was 180ms (B) when S_1-S_2 was 500ms; 490ms, S_2-R_2 jump extended to 310ms (C), before and after a difference of 130ms; diagnosis of atrioventricular node dual pathways.When program-controlled scanning to 360-350ms atrioventricular conduction interruption (E, F) (G) Consistently consistent QRS complex before and after conduction interruption Diagnosis of gap phenomenon in slow pathway.