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Figure 4 Door-to-Balloon Time During Regular Hours and Off Hours Before and After Implementing Protocol

(A) Door-to-balloon time for patients presenting to Saint Marys Hospital treated with primary percutaneous coronary intervention (PCI) during regular hours before and after implementation of the ST-segment elevation myocardial infarction (STEMI) protocol. (B) Door-to-balloon time for patients presenting to Saint Marys Hospital treated with primary PCI during off hours before and after implementation of the STEMI protocol.