Pulmonary vascular resistance index (PVRI) and systemic vascular resistance index (SVRI) before and after cement injections. In the control group, baseline and preinjection values are identical because only one cardiac output measurement has been taken before injection. Thearrowsindicate the three cement injections. The number of measurements was six for all time points. #P< 0.05 from baseline value. *P< 0.05 from preinjection value. †P< 0.05 from control group (P< 0.05).