case_images: PMC6197009_01
case_images: EKG upon presentation.. HR: 75 BPM Normal sinus rhythmPR interval 178 msQRS duration 72 msQT/QTc 494/551 ms Prolonged QTFlattened T waves and prominent U waves (arrows) with apparent QT interval prolongation
case_images: ZJCH_A_1514943_F0001_PB.jpg
case_images: PMC6197009_01_ZJCH_A_1514943_F0001_PB.jpg
case_images: F0001
case_images: Electrocardiogram (ECG) (Figure 1) showed no arrhythmias, but changes characteristic of hypokalemia with increased amplitude of the U-wave and marked corrected QT segment prolongation (QTc 551 ms).
case_images: EKG after electrolyte supplementation.. HR: 92 BPM Normal sinus rhythmPR interval 132 msQRS duration 72 msQT/QTc 360/445 ms
case_images: ZJCH_A_1514943_F0002_PB.jpg
case_images: PMC6197009_01_ZJCH_A_1514943_F0002_PB.jpg
case_images: F0002
case_images: Serial electrocardiogram monitoring showed resolution of ECG changes (Figure 2).
case_images: Serum potassium level Day 1 - Day 13.
case_images: ZJCH_A_1514943_F0003_B.jpg
case_images: PMC6197009_01_ZJCH_A_1514943_F0003_B.jpg
case_images: F0003
case_images: Aggressive supplementation of electrolytes was initiated (Table 1), however despite supplementation with enteral and parenteral potassium as well as magnesium and phosphate, potassium level failed to increase (Figure 3) and subsequently she had a sinus bradycardia followed by asystole.