Canadian History Ehx on Nostr: Today in 1956, Dr. John Carter Callaghan performs Canada's first successful ...
Today in 1956, Dr. John Carter Callaghan performs Canada's first successful open-heart surgery on 10-year-old Susan Beattie.
Dr. Callaghan is also noted for being a co-developer of the artificial pacemaker.
Published at
2023-09-15 13:33:20 UTCEvent JSON
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