ECG Holter System (3 channel / 12 channel ) The system is a recording device and automatic analysis software system, to continuously monitor the dynamic ECG changes of human body during 24 hours. For the patiens with the symptom of palpitation, dizziness or fainting, 24-hour dynamic ECG monitoring is the major inspection means of arrhythmia clinical diagnosis, such as, extreme bradycardia, heart arrest, conduction block and ventricular tachycardia and etc. , is also one of standardized methods of monitoring myocardial ischemia.