The phrase "altered after a" is grammatically correct and can be used in written English.
It can be used in contexts where something has been changed or modified following a specific event or condition.
Example: "The document was altered after a thorough review by the committee."
Alternatives: "modified following a" or "changed subsequent to a".
It was the Coast Guard, in fact, that threatened to end the race before it started unless safety rules were altered after a sailor from the Swedish team died after a boat capsized during practice in May.
The moving story, chronicled in John Colapinto's book "As Nature Made Him," of David Reimer, who as an infant was surgically altered after a botched circumcision to become a girl, suggests how long-lasting the effect of fetal testosterone can be.
No other TMS measure of corticomotor excitability was altered after a single dose of sulthiame.
For all participants, no cognitive capacity was significantly altered after a night shift of 14 h when compared with performance after a night of rest.
There is considerable evidence that proliferation and growth in the mandibular condylar cartilage (MCC) might be altered after a change in the postural position of the mandible.
Notice the stronger underestimation and change in the overall shape for all latitudes clearly visible in September 2009 when the state of the GOME-2 instrument was significant altered after a throughput test.
Virtually everything that follows, whether it concerns Gio or not, is understood to belong to a terribly altered "after".
Rosenfeld, whose research on homicide trends in St Louis were used to debunk the Ferguson Effect last year, said that his "views have been altered" after doing a broader national analysis.
These patterns were, however, not present during double limb stance with closed eyes and did not alter after an intense bout of highly intense aerobic interval exercise.
A friend of DiNardo's told HuffPost earlier this week that DiNardo's behavior was altered after he suffered a head injury in a dirt bike accident a few months ago.
The goal of this study was to show how the response of a cable was altered after it impacted a straight obstacle.
