SVR (dynes / sec / cm-5) after IABP Time Total (n=45) Group 1 (n=26) Group 2 (n=19) P (1 - 2) T0 1316.3 ± 112.8 1308.6 ± 134.1 1335.3 ± 120.2 >0.05 T1 1204.4 ± 123.4 1190.9 ± 103.4 1292.7 ± 115.2 >0.05 T3 1183.7 ± 102.9 1156.5 ± 100.2 1209.4 ± 99.2 >0.05 T6 1057.2 ± 101.2 930.2 ± 104.2 1194.9 ± 90.1 >0.05 T24 1037.2 ± 98.2 926.7 ± 90.1 * 1185.1 ± 101.5 <0.05 T48 1052.7 ± 90.1 925.3 ± 121.2 1190.7 ± 105.6 <0.05 T72 986.7± 89.5 * 874.7 ± 88.2 1105.0 ± 99.0 * <0.05 D4 975.2 ± 99.1 861.3 ± 101.6 1069.9 ± 89.3 <0.05 D5 919.1 ± 79.2 850.4 ± 100.2 1058.0 ± 97.4 <0.05 D6 838.4 ± 101.9 822.8 ± 90.6 901.9 ± 95.2 <0.05 D7 814.5 ± 99.0 807.6 ± 91.3 934.2 ± 93.1 <0.05 Comment: SVR decreased after 72 hours: 986.7 ± 9.5 vs 1316.3 ± 112.8.