自生物电现象的发现到第一帧心电图记录以来至今已有近八十年的历史。在这一时期中,人们对反映心脏电激动过程所描记下来的心电图的研究随着心脏解剖学与心脏生理学的发展而深入发展,使这一由心脏发出,通过机体容积导体传导至体表的微弱生物电流的变化,成为临床确诊各种心律失常(包括激动源本身的异常和传导上的障碍)、急性心肌梗塞等具有决定性的意义。对其他许多心脏疾患,如心房、心室肥大、心肌炎,心包炎、急性和慢性肺原性心脏病和冠状动脉心脏病,以及电解质平衡失调和药物中毒等等都有很重要的参考诊断价值。但是利用现有常规的心电图机却只能记录很短一段时间内的心电变化,往往对于那些具有早期诊断价值的偶暂瞬时异常的心电变化(如偶尔的心电逸搏、早搏、阵发性心动过缓、过速和早期冠心病等等)不能及时记下,这就使不少心脏病患者的早期诊断失去了 It has been almost eighty years since the discovery of bioelectric phenomena until the first electrocardiographic recording. During this period, the research on the electrocardiogram which is reflected in the process of electrocardiographic echocardiography has been further developed with the development of cardiac anatomy and cardiology so that the heart, which is conveyed by the body volume conductor to the body surface Faint biological current changes, as clinically diagnosed a variety of arrhythmias (including the activation of the source of their own abnormalities and conduction disorders), acute myocardial infarction and other decisive significance. Many other heart diseases, such as atrial, ventricular hypertrophy, myocarditis, pericarditis, acute and chronic pulmonary heart disease and coronary heart disease, as well as electrolyte imbalance and drug poisoning and so have a very important reference diagnostic value. However, the use of existing conventional electrocardiographs can only record ECG changes in a short period of time, often for those with early diagnostic value of the temporary transient abnormal changes in ECG (such as occasional ECG escape, premature beat, array Hair bradycardia, tachycardia and early coronary heart disease, etc.) can not be noted in time, which makes the early diagnosis of many heart disease patients lost