Fig. 2From: Transthoracic echocardiography: an accurate and precise method for estimating cardiac output in the critically ill patient a Correlation between CO-PAC and CO-TTE (r = 0.95; p < 0.0001). b Bland–Altman plot for CO-PAC and CO-TTE (n = 64 pairs of measurements). Solid line: bias; dashed line: LOA. CO-PAC cardiac output measured by pulmonary artery catheter, CO-TTE cardiac output estimated by transthoracic echocardiographyBack to article page