Individual Organ Perfusion ± SEM Before and After Multiple Injection of Polystyrene Microspheres A Hepatic, renal, splenic, and posterior left ventricle blood flow pre- and post- injection of 11.2 million microspheres. B Hepatic, renal, splenic, and posterior left ventricle blood flow pre- and post- injection of 18 million microspheres. C Combined results from Figure 3A and Figure 3B.