Freeze-dried valves used in animal heart surgery for first time

Garo/Phanie/REX/Shutterstock By Jessica Hamzelou Pieces of heart tissue can be freeze-dried and later rehydrated for transplantation, according to research in sheep. The technique could allow donated human tissue to be stored cheaply for years, and enable doctors to choose the perfect transplants “off the shelf”, rather than having to use whatever is available at the time. Cardiovascular diseases are the leading cause of death worldwide, and around 250,
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