Several ECG changes can be indicative of toxicological issues. These include:
Prolonged QT interval: Often associated with drugs like antipsychotics and antidepressants, which can lead to Torsades de Pointes. QRS widening: Indicative of sodium channel blocking agents like tricyclic antidepressants. ST segment changes: Can suggest myocardial ischemia due to cocaine or other stimulants. Bradycardia or tachycardia: Can result from a variety of toxic agents including beta-blockers or anticholinergics.
