ECG-Derived Respiration

The ECG-Derived Respiration (EDR) technique is an approach to obtain a respiration signal from an ECG.. It is based on the observation that the positions of ECG electrodes on the chest surface move relative to the heart, and transthoracic impedance varies, as the lungs fill and empty. Thus the lead axes vary at different points in the respiratory cycle, and any sufficiently precise measurement of the mean cardiac electrical axis shows variations that are correlated with respiration. This method is particularly effective if two or more ECG signals are available, but a single lead is sufficient. The EDR can be obtained even in the context of congestive heart failure, in which RSA may be absent.

心电图导出的呼吸（ECG-Derived Respiration，简称EDR）技术是一种从心电图（ECG）中获取呼吸信号的方法。该技术基于以下观察：心电图电极在胸壁表面的位置相对于心脏而言发生移动，且跨胸阻抗随肺部的充盈和排空而变化。因此，导联轴在不同呼吸周期中的位置也随之变化，任何对平均心脏电轴的足够精确的测量都显示出与呼吸相关的变化。当有两个或更多心电图信号可用时，该方法尤为有效，尽管单个导联即可满足需求。即使在充血性心力衰竭的背景下，EDR技术仍能获得呼吸信号，此时呼吸阻抗分析（RSA）可能不存在。