• Digitalis toxicity often causes AV conduction block with ectopic escape beat.
• Certain ECG changes might be suggestive of digitalis toxicity including:
Bidirectional ventricular tachycardia
Atrial tachycardia with AV block
Atrial fibrillation with slow ventricular response
Regularized atrial fibrillation
• In patients on digoxin, ECG might show “digitalis effect” including downsloping or “scooping” of ST segment.
