|  Final 19:22 | time | gap | L | React. | Butter | Back | Breast |  | 1. Caitlin Leverenz |  USA | 4:35.46 | PR | 4 | 0.76 | 1:01.51 | 2. | 2:13.55 | 2. | 3:31.26 | 1. |  | 2. Sydney Pickrem |  CAN | 4:38.03 | 2.57 | 3 | 0.78 | 1:04.57 | 7. | 2:15.60 | 5. | 3:34.84 | 3. |  | 3. Joanna Maranhao |  BRA | 4:38.07 | 2.61 | 2 | 0.79 | 1:03.27 | 4. | 2:14.80 | 4. | 3:35.59 | 4. |  | 4. Katherine Mills |  USA | 4:41.19 | 5.73 | 6 | 0.81 | 1:01.97 | 3. | 2:14.11 | 3. | 3:36.05 | 5. |  | 5. Virginia Bardach |  ARG | 4:44.85 | 9.39 | 7 | 0.82 | 1:03.41 | 5. | 2:18.85 | 6. | 3:39.19 | 6. |  | 6. Natalia Jaspeado |  MEX | 4:49.89 | 14.43 | 1 | 0.70 | 1:04.29 | 6. | 2:21.36 | 7. | 3:42.75 | 7. |  | 7. Moniika Gonzalez-Hermosillo |  MEX | 4:53.83 | 18.37 | 8 | 0.81 | 1:06.49 | 8. | 2:22.05 | 8. | 3:46.52 | 8. |  | -. Emily Overholt |  CAN | DQ |   | 5 |   |   |   |   |   |   |   |   
| World Record: Yen Shiwe (CHN) 4:28.43, London (GBR), 28.07.2012. |  | Pan American Games Record: Joanne Malar (CAN) 4:38.46, Winnipeg (CAN), 02.08.1999. |  | Qualification times. Standard A: 4:55.99, Standard B: 5:17.99. |   
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| Final B 19:12 | time | gap | L | React. | Butter | Back | Breast |  | 8. Florencia Perotti |  ARG | 4:50.52 |   | 4 | 0.83 | 1:05.71 | 1. | 2:18.66 | 1. | 3:43.49 | 1. |  | 9. Gabrielle Goncalves |  BRA | 4:53.49 | 2.97 | 5 | 0.70 | 1:06.82 | 2. | 2:23.84 | 2. | 3:47.91 | 2. |  | 10.Andrea Cedron |  PER | 5:05.81 | 15.29 | 6 | 0.75 | 1:08.98 | 4. | 2:28.01 | 3. | 3:59.31 | 4. |  | 11.Maria Fernanda Far |  PAN | 5:06.36 | 15.84 | 2 | 0.78 | 1:06.86 | 3. | 2:28.51 | 4. | 3:59.16 | 3. |  | 12.Karen Vilorio |  HON | DNS |   | 3 |   |   |   |   |   |   |   |   
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  Heats - Thursday 16.07 10.05  |  | First 8 to Final. Next 8 to Final B.  |   
| Ranking | time | gap | L | React. | Butter | Back | Breast | .Heat |  | 1. Caitlin Leverenz |  USA | 4:37.74 |   | 4 | 0.81 | 1:01.71 | 1. | 2:13.73 | 1. | 3:31.74 | 1. | Heat 1 |  | 2. Emily Overholt |  CAN | 4:39.84 | 2.10 | 4 | 0.84 | 1:02.94 | 2. | 2:15.17 | 2. | 3:35.70 | 1. | Heat 2 |  | 3. Sydney Pickrem |  CAN | 4:40.77 | 3.03 | 5 | 0.80 | 1:04.96 | 3. | 2:16.38 | 3. | 3:36.19 | 3. | Heat 2 |  | 4. Katherine Mills |  USA | 4:41.05 | 3.31 | 3 | 0.75 | 1:02.14 | 1. | 2:14.24 | 1. | 3:35.94 | 2. | Heat 2 |  | 5. Joanna Maranhao |  BRA | 4:45.28 | 7.54 | 5 | 0.78 | 1:03.95 | 2. | 2:15.69 | 2. | 3:39.10 | 2. | Heat 1 |  | 6. Virginia Bardach |  ARG | 4:48.96 | 11.22 | 3 | 0.82 | 1:03.99 | 3. | 2:19.44 | 3. | 3:41.45 | 3. | Heat 1 |  | 7. Natalia Jaspeado |  MEX | 4:51.69 | 13.95 | 6 | 0.70 | 1:05.28 | 4. | 2:24.04 | 6. | 3:45.71 | 5. | Heat 1 |  | 8. Moniika Gonzalez-Hermosillo |  MEX | 4:52.24 | 14.50 | 2 | 0.80 | 1:05.87 | 5. | 2:21.57 | 4. | 3:45.31 | 4. | Heat 1 |  |  to Final B |  | 9. Florencia Perotti |  ARG | 4:52.60 | 14.86 | 6 | 0.81 | 1:05.50 | 4. | 2:18.89 | 4. | 3:44.33 | 4. | Heat 2 |  | 10.Gabrielle Goncalves |  BRA | 4:55.65 | 17.91 | 2 | 0.74 | 1:06.62 | 5. | 2:23.37 | 5. | 3:49.09 | 5. | Heat 2 |  | 11.Karen Vilorio |  HON | 5:03.69 | 25.95 | 7 | 0.77 | 1:06.17 | 6. | 2:22.64 | 5. | 3:52.56 | 6. | Heat 1 |  | 12.Andrea Cedron |  PER | 5:07.00 | 29.26 | 7 | 0.78 | 1:08.23 | 7. | 2:27.80 | 6. | 3:59.33 | 6. | Heat 2 |  | 13.Maria Fernanda Far |  PAN | 5:10.85 | 33.11 | 1 | 0.79 | 1:06.74 | 6. | 2:29.07 | 7. | 4:00.30 | 7. | Heat 2 |   
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| Swimmer | Q. time | Birth |  | Emily Overholt |  CAN | 4:37.89 | 04 OCT 1997 |  | Caitlin Leverenz |  USA | 4:38.31 | 26 FEB 1991 |  | Sydney Pickrem |  CAN | 4:39.26 | 21 MAY 1997 |  | Joanna Maranhao |  BRA | 4:40.57 | 29 APR 1987 |  | Katherine Mills |  USA | 4:44.30 | 21 MAR 1989 |  | Virginia Bardach |  ARG | 4:46.62 | 03 APR 1992 |  | Andreina Pinto |  VEN | 4:48.80 | 10 SEP 1991 |  | Florencia Perotti |  ARG | 4:48.88 | 24 SEP 1992 |  | Natalia Jaspeado |  MEX | 4:51.20 | 24 MAY 1998 |  | Gabrielle Goncalves |  BRA | 4:51.40 | 19 JUL 1998 |  | Moniika Gonzalez-Hermosillo |  MEX | 4:52.66 | 27 OCT 1995 |  |  Standard A: 4:55.99 |  | Andrea Cedron |  PER | 5:01.51 | 24 DEC 1993 |  | Karen Vilorio |  HON | 5:05.44 | 27 MAY 1993 |  | Fernanda Maria Far |  PAN | 5:07.36 | 06 JAN 1998 |  |  Standard B: 5:17.99 |   
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