Tricyclic Antidepressant Intoxication.

A 48 year – old woman is brought by ambulance to the Emergency Department after 45 minutes of ingestion 58 tablets of Amitryptiline.  Her GCS is 14; BP 100/48 mmHg, HR 54, RR 22.  There are not arrhythmias but in the ECG can be observed a prolonged QT interval (460 ms). Her blood gas reveals the following results:

pH: 7.36
PaO2 12.5 kPa (93.7 mmHg)
PaCO2 3.5 kPa (26.2 mmHg)
CO3H 18 mmol/l
Lactate 4.9 mmol/l (88.2 mg/dl).
Na 142 mmol/l
K 4.4 mmol/l
Cl 102 mmol/l
Glucose: 5.4 mmol/l (97 mg/dl)
Salicylates and Paracetamol: Undetectable.
Which of the following statements are correct regarding this intoxication?:

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