目的　观察临床具有某些类心源性症状的患儿其症状与心律失常的关系。方法　利用惠普新世纪(HP43420AK)动态心电图分析仪对以胸闷、心悸、眩晕或晕厥为主诉,临床检查未见器质性心脏病,多次普通心电图正常,心肌酶正常或轻度增高的患儿进行24小时动态心电监测。结果　78例患儿检出各种心律失常54例,占6923%。青春期初期(14～10岁)明显多于其它年龄段,占7692%。监测期间出现预期症状和未出现预期症状的心律失常检出率分别为6551%和80%,二者之间无显著差异(χ2=3814,P>005)。结论　(1)DCG对判断是否为心源性因素所致胸闷、心悸、晕厥和眩晕具有决定性作用;(2)青春期初期以上述症状就诊者需与机体内分泌变化引起的植物神经功能紊乱鉴别,不可盲目诊断心肌炎 Objective To observe the clinical symptoms of some patients with cardio-like symptoms and arrhythmias. Methods Hepatic New Age (HP43420AK) Holter Analyzer for chest tightness, palpitations, dizziness or fainting is the main complaint, no organic disease in clinical examination, multiple normal ECG, normal or mild myocardial enzyme increased in children 24-hour Holter monitoring. Results 78 cases of children were detected in various arrhythmias in 54 cases, accounting for 6923%. Early adolescence (14 to 10 years old) was significantly more than other age groups, accounting for 7692%. The detection rate of arrhythmia with expected symptoms and no anticipated symptoms during surveillance was 6551% and 80%, respectively, with no significant difference (χ2 = 3814, P> 005). Conclusions (1) DCG plays a decisive role in determining whether chest tightness, palpitations, fainting and dizziness caused by cardiac factors; (2) early adolescence in patients with the above symptoms need to be identified with autologous endocrine changes caused by autonomic dysfunction, not Blind diagnosis of myocarditis