Fig. 4From: Transthoracic echocardiography: an accurate and precise method for estimating cardiac output in the critically ill patientFour-quadrant plot of %ΔCO-TTE vs %ΔCO-PAC. A central exclusion zone of 15% (square) was applied. Concordance rate was 94%. CO-PAC cardiac output measured by pulmonary artery catheter, CO-TTE cardiac output estimated by transthoracic echocardiographyBack to article page