Fig. 3. The effect of pressure reconstruction in two patients (A and B ). In the panels A 1 and B 1, the radial pressure (bold ) is combined with the unreconstructed finger pressure; in the panels A 2 and B 2 radial pressure is combined with the reconstructed pressure. A sharp systolic peak in the radial pressure is increased in the raw finger pressure measurement (A 1). This increase is reduced by waveform filtering; in addition to this, the level correction lifts the curve up (A 2). Also a larger pressure drop from radial to finger (B 1) is reduced by level correction (B 2). Because there is no clear systolic peaking, waveform filtering has little effect in this patient.