Overview

• Condition of independent beating of atria & ventricles; caused by (1) block of atrial-activating impulse in AV junction or (2) interference with conduction of atrial-activating impulse by a ventricular impulse

ECG Features

• Independent atrial and ventricular rates
• Ventricular rate ≥ atrial rate
• Regular P-P and R-R interval measurements with changes in position of P waves in relation to the QRS complex (i.e. P waves “march out” at their own pace)