Figure 4

The areas under the curve (AUCs) for renal pre-ejection period (rPEP), 1/renal ejection time (rET), and rPEP/rET measured from renal Doppler ultrasound (A) and pre-ejection period (PEP), 1/ejection time (ET), and PEP/ET measured from echocardiography (B) in prediction of left ventricular ejection fraction <50%.