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Perhaps adrenaline directly into the heart. Oddly though that has been used for more than 60 years to assist with CPR, the evidence that it actually does more good than injecting into a vein is thin on the ground. Something like a 3.2% survival rate (131/4,105) compared to 2.4% (96/3999) in one study but severe brain damage is found in 31% of those who received adrenaline compared to 18% of those who did not receive adrenaline. OTOH, only 27 of the 227 people in the study were revived without showing neurological symptoms checked at 30 days after revival.
But aspirin directly into the heart? AFAIR, aspirin is used as a blood thinner and a direct injection into the heart sounds like the heirs and assigns will be launching a malpractice suit.
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