Swimming at the 2011 Pan American Games – Men's 400 metre individual medley

Prior to this competition, the existing world and Pan American Games records were as follows:

World record	Michael Phelps (USA)	4:03.84	Beijing, China	August 10, 2008
Pan American Games record	Thiago Pereira (BRA)	4:11.14	Rio de Janeiro, Brazil	July 17, 2007

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (4:34.2) in the qualifying period (January 1, 2010 to September 4, 2011). NOCs were also permitted to enter one athlete providing they had met the B standard (4:41.5) in the same qualifying period.[2]

All times shown are in minutes.

Heats

The first round was held on October 15.[3]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	2	5	Conor Dwyer	United States	4:24.98	QA
2	2	4	Thiago Pereira	Brazil	4:26.27	QA
3	1	4	Robert Margalis	United States	4:29.70	QA
4	2	3	Esteban Enderica	Ecuador	4:31.15	QA
5	2	6	Ezequiel Trujillo	Mexico	4:31.31	QA
6	1	6	Esteban Paz	Argentina	4:34.08	QA
7	1	5	Diogo Yabe	Brazil	4:34.18	QA
8	1	3	Liam Dias	Canada	4:37.60	QA
9	1	2	Eddy Marin	Venezuela	4:38.88	QB
10	2	2	Diego Castillo	Panama	4:45.31	QB
11	2	7	Joel Romeu	Uruguay	4:53.76	QB

B Final

The B final was also held on October 15.[4]

Rank	Lane	Name	Nationality	Time	Notes
9	5	Diego Castillo	Panama	4:40.04
10	4	Eddy Marin	Venezuela	4:40.08

A Final

The A final was held on October 15.[5][4]

Rank	Lane	Name	Nationality	Time	Notes
	5	Thiago Pereira	Brazil	4:16.68
	4	Conor Dwyer	United States	4:18.22
	3	Robert Margalis	United States	4:24.88
4	6	Esteban Enderica	Ecuador	4:26.43
5	2	Ezequiel Trujillo	Mexico	4:30.02
6	8	Liam Dias	Canada	4:34.11
7	1	Diogo Yabe	Brazil	4:35.66
8	7	Esteban Paz	Argentina	4:37.67