ECG
Atrial rate >100 bpm
P-waves
Morphology abnormal (when compared with sinus P wave due to ectopic origin)
Has at least three consecutive identical ectopic p waves
Axis frequently abnormal (e.g. inverted in inferior leads)
QRS complexes
Usually normal morphology (unless pre-existing bundle branch block, accessory pathway, or rate related aberrant conduction)
Baseline isoelectric (unlike atrial flutter)
AV block may be present
Morphology abnormal (when compared with sinus P wave due to ectopic origin)
Has at least three consecutive identical ectopic p waves
Axis frequently abnormal (e.g. inverted in inferior leads)
Usually normal morphology (unless pre-existing bundle branch block, accessory pathway, or rate related aberrant conduction)
Atrial tachycardia
Regular
Wide-complex tachycardia
AV Node Independent
Junctional tachycardia
Sinus tachycardia
Narrow-complex tachycardia
Atrial tachycardia 