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急性心肌梗塞预后取决于心肌损害的程度、心肌缺血的持续及恶性室性心律失常的发生。动态心电图对检测猝死倾向的患者是敏感的,但由于自发性室性心律失常发生率高,使其临床价值受限,因此需要有更为特异的方法以检测急性心肌梗塞后具有心脏性猝死或持久性室速危险的患者。最近发展起来的体表非创伤性检出心室后电位技术可能是一有希望的途径。心室后电位由低振幅碎裂电活动所组成,发生在QRS波的终末或ST段中,它们可能从陈旧心肌梗塞边缘的局部缓慢传导区产生,即可能从致心律失常的基础上起源的。
The prognosis of acute myocardial infarction depends on the extent of myocardial damage, myocardial ischemia and the occurrence of malignant ventricular arrhythmias. Holter monitoring is sensitive to the risk of sudden death, but due to the high incidence of spontaneous ventricular arrhythmias, which limits their clinical value, there is a need for more specific methods to detect sudden cardiac death after acute myocardial infarction Patients with persistent VT risk. Recently developed noninvasive detection of post ventricular posterior ventricular potential technology may be a promising way. Ventricular posterior potentials, which consist of electrical activity of low amplitude fragmentation, occur at the terminal or ST segment of the QRS wave and may originate from the locally slow conduction region at the edge of old myocardial infarction, possibly from the origin of arrhythmia .