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(a) Electrocardiogram on 11/29/2014 @ 12:23:28. Diphenhydramine 50 mg given on 11/28/2014 @ 18:46. QT 586 ms/QTc 555 ms (markedly prolonged). (b) Electrocardiogram on 11/30/2014 @ 13:44. Diphenhydramine 50 mg given on 11/29/2014 @ 07:30. QT 512 ms/QTc 498 ms (markedly prolonged).
