Figure 1From: Evaluation of a new pocket echoscopic device for focused cardiac ultrasonography in an emergency settingComparison of left ventricular ejection fractions (LVEFs) obtained by two devices. LVEFs were compared by using (a) linear correlation and (b) Bland and Altman analysis. A conventional high-quality echocardiography system was considered the reference. PUD, pocket ultrasound device; SD, standard deviation.Back to article page