Heart Blocks ECG Quiz 14 Answer

1. Atrial tachycardia with 2:1 conduction
2. Non-specific ST-T wave abnormalities
3. Poor R wave progression
4. Consider digoxin toxicity

Atrial tachycardia occurs when a focus in the atrium outside the AV node fires rapidly causing increased ventricular heart rates. When conducting in a 2:1 ratio like on this ECG, digoxin toxicity should be considered as this is a common finding in this setting. 

Related Topic Reviews: Ectopic Atrial Rhythms, Digoxin ECG Changes, Poor R Wave Progression