Fig. 2

Receiver operating characteristics curves using three non-invasive methods to estimate the femoral-to-radial arterial pressure gradient (FR-APG) defined in terms of mean arterial pressure (MAP). The first method (purple) is using the average of the three non-invasive measurements (T1, T2 and T3) of the two upper limbs. The second method (orange) is using only non-invasive MAP value at T1. The third method (green) is using only non-invasive systolic arterial pressure (SAP) value at T1. NIBR-APG non-invasive brachial-to-radial arterial pressure gradient; FR-APG is defined as an FR-APG of more than 10 mmHg MAP measured with invasive femoral and radial cannulae