PMC6199886_01
EKGs obtained after the patient experienced cardiac arrest demonstrated a prolonged QTc.
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fig1
The post-arrest ECGs (Figure 1) were notable for normal sinus rhythm with a rate of 98-99, and a QTc of 495-521 ms (normal QTc is <440 ms in men).
EKG on hospital day 11 with a QTc of 611 ms with a serum potassium level of 3.8 mEq/L and a magnesium level of 2.1 mEq/L.
CRIEM2018-5023954.002.jpg
PMC6199886_01_CRIEM2018-5023954.002.jpg
fig2
Multiple post-arrest ECGs consistently demonstrated a prolonged QTc with measurements up to 611 ms despite optimization of electrolytes (Figure 2).