The Women's 400m individual medley event at the 2010 South American Games was held on March 27, with the heats at 11:22 and the Final at 18:30.
Medalists edit
| Gold | Silver | Bronze |
Joanna Maranhão Brazil
|
Larissa Cieslak Brazil
|
Samantha Arévalo Ecuador
|
Records edit
| Standing records prior to the 2010 South American Games | ||||
|---|---|---|---|---|
| World record |  Stephanie Rice (AUS)
|
4:29.45 | Beijing, China | 10 August 2008 |
| Competition Record |  Georgina Bardach (ARG)
|
4:53.42 | Buenos Aires, Argentina | 16 November 2006 |
| South American record | Georgina Bardach (ARG)
|
4:37.51 | Athens, Greece | 14 August 2004 |
Results edit
Heats edit
| Rank | Heat | Lane | Athlete | Result | Notes |
|---|---|---|---|---|---|
| 1 | 2 | 4 | Joanna Maranhão (BRA)
|
5:01.55 | Q |
| 2 | 2 | 7 | Samantha Arévalo (ECU)
|
5:11.33 | Q |
| 3 | 2 | 5 | Julia Arino (ARG)
|
5:11.35 | Q |
| 4 | 1 | 4 | Virginia Bardach (ARG)
|
5:13.49 | Q |
| 5 | 2 | 2 |  Patricia Mariana San Martin (PER)
|
5:13.93 | Q |
| 6 | 1 | 33 |  Erika Stewart (COL)
|
5:14.86 | Q |
| 7 | 1 | 6 | Maria Alejandra Perez (PER)
|
5:15.10 | Q |
| 8 | 1 | 5 | Larissa Cieslak (BRA)
|
5:15.15 | Q |
| 9 | 2 | 3 |  Eliana Barrios (VEN)
|
5:16.833 | |
| 10 | 1 | 2 |  Daniela Reyes (CHI)
|
5:18.43 | |
| 11 | 2 | 6 | Carolina Restrepo (COL)
|
5:25.55 | |
| 12 | 2 | 1 |  Daniella van den Berg (ARU)
|
5:28.48 | |
| 13 | 1 | 7 | Carla Silvana Torres (ECU)
|
5:33.51 | |
| 14 | 1 | 1 |  Karlene van der Jagt (SUR)
|
5:44.14 |
Final edit
| Rank | Lane | Athlete | Result | Notes |
|---|---|---|---|---|
 |
4 | Joanna Maranhão (BRA)
|
4:52.84 | CR |
 |
8 | Larissa Cieslak (BRA)
|
5:01.58 | |
 |
5 | Samantha Arévalo (ECU)
|
5:03.77 | |
| 4 | 6 | Virginia Bardach (ARG)
|
5:07.75 | |
| 5 | 1 | Maria Alejandra Perez (PER)
|
5:11.46 | |
| 6 | 3 | Julia Arino (ARG)
|
5:13.09 | |
| 7 | 7 | Erika Stewart (COL)
|
5:14.94 | |
| 8 | 2 | Patricia Mariana San Martin (PER)
|
5:15.76 |