心电图学基础 Fundament of the Ecg (-)心血管传导系统 cardiovascular intrinsic conduction system (二)正常心电图波形 normal electrocardiographic complexes (三)心电图导联 leads of the ecg 返回心一、心电图学基础 Fundament of the ECG （一）心血管传导系统 cardiovascular intrinsic conduction system （二）正常心电图波形 normal electrocardiographic complexes （三）心电图导联 leads of the ECG