Lansdowne L M
Pocono Medical Center, East Stroudsburg, PA 18301.
Heart Lung. 1990 Jul;19(4):329-35.
The signal-averaged electrocardiogram (ECG) is a simple, noninvasive test used to predict which patients may be prone to sudden cardiac death because of ventricular tachycardia. Signal averaging allows detection of low-amplitude waveforms in the ECG that are normally masked by noise. The averaging process is done by a computerized ECG machine. The results of abnormal signal-averaged ECGs can be used to predict ventricular tachycardia in patients after a myocardial infarction, with syncope, and after subendocardial resections. Application of the signal-averaged ECG in many other types of patients is currently being studied. The use of this diagnostic tool is rapidly increasing. Cardiac nurses should be aware of the methods and current research results of signal averaging.
信号平均心电图（ECG）是一种简单的非侵入性检查，用于预测哪些患者可能因室性心动过速而易于发生心源性猝死。信号平均能够检测出心电图中通常被噪声掩盖的低振幅波形。平均过程由计算机化心电图机完成。异常信号平均心电图的结果可用于预测心肌梗死后、有晕厥症状以及心内膜下切除术后患者的室性心动过速。目前正在研究信号平均心电图在许多其他类型患者中的应用。这种诊断工具的使用正在迅速增加。心脏科护士应了解信号平均的方法和当前研究结果。
