The AV synchrogram: A novel approach to quantify atrioventricular coupling during atrial arrhythmias

► The generation of ventricular response during atrial arrhythmias is poorly understood. ► The AV synchrogram is introduced, which quantifies AV coupling by a stroboscopic observation of the ventricular phase at times triggered by atrial activation. ► AV synchrogram analysis detected changes in AV coupling in different arrhythmia types. ► AV synchrogram analysis reconstructed the dynamics of nodal response during AF time course. ► AV synchrograms may find application for AV node response characterization in the clinical setting.