Trusov claimed gold in the men's 100m backstroke S7 event and broke the world record with a time of 1:08.14, according to Ukrinform.
Another Ukrainian, Yevhenii Bohodaiko, finished fifth at 1:11.57.
Trusov earlier won silver medals in the men's 400m freestyle and 200m breaststroke events in the Tokyo Paralympics.
Ukraine's national Paralympic team has already won 48 medals - 12 golds, 24 silvers, and 12 bronzes.
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