Cardiopulmonary Resuscitation (CPR) is an emergency medical procedure developed by humans to treat victims of cardiac arrest. Because of its effectiveness, despite its lack of technology, it has been employed for centuries. Technology did eventually advance to a point where CPR was effectively obsolete for humans, however it was still taught as a technique for emergency field medicine where technology may not be accessible.

While in the Uncharted Territories, John Crichton taught the technique to Aeryn Sun.

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