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Therapeutic hypothermia protocols from January 2009 to December 2013. CAG indicates coronary angiography; PCI, percutaneous coronary intervention. (A) When the time interval from collapse to the return of spontaneous circulation (ROSC) was within 20 min, we performed the 34 °C targeted core temperature, and the cooling duration was 24 h (Group C). (B) When the interval was not within 20 min, we performed the 34 °C targeted core temperature, and the cooling duration was 48 h (Group D).
