这句话，怎么理解翻译？

An implantable cardioverter-defibrillator (ICD) should be considered before
discharge for which of the following STEMI patients?
A. STEMI presenting with VF (successfully resuscitated)
B. STEMI with sustained ventricular tachycardia (VT)/VF occurring more
than 48 hours after presentation
C. STEMI with ongoing runs of nonsustained VT on telemetry
D. STEMI with predischarge ejection fraction of 30% or less, regardless
of rhythm
E. All of the above

上面答案B中，红色粗体部分after presentation。指的是“就诊后”“入院后”，还是什么意思。由于基础太差，理解有困难。请各位高手多多帮助。