Friends of Miss Nicholls, students Jessica Reeve and Izzy Winter, began fundraising through GoFundMe for Clarissa’s Campaign for Cambridge Hearts.
The goal was to raise £7,000, which would pay for one day of ECG screening for about 100 young people.
“Clarissa is fortunate to have some amazing friends,” Mrs Nicholls told BBC Radio Cambridgeshire.
“I am sure she would have been very proud of the legacy she has given to the university, and very proud of her friends for having turned this tragedy around into something that is actually positive.”
She said students were now being offered “Rolls-Royce” ECG tests.
Her daughter did not have the “opportunity” students were now having, she said.
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