Haemodynamic variables in patients in the first 5 min of the tilt test, grouped by intervention. The baseline value is a supine recording. Haemodynamic values are: CI, cardiac index (L/min/m2); heart rate (b.p.m.); MAP, mean arterial pressure (mmHg); SVI, stroke volume index (mL/m2); SVRI, systemic vascular resistance index (dynes*s/cm5*m2).