Fig. 1
From: What is the lowest change in cardiac output that transthoracic echocardiography can detect?
Method for assessing intra-examination precision (a) and inter-examination least significant change (b). CV coefficient of variation, SD standard deviation. Asterisk indicates that for the sake of simplicity, the figure is presented as if all end-expiratory cycles were consecutive. If we could not record enough cycles during the end-expiratory period of one cycle, the values recorded during the end-expiration in several cycles were used