Retrograde conduction of ventricular extrasystoles to the atria.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D004562:Electrocardiography; D006325:Heart Atria; D006339:Heart Rate; D006801:Humans; D018879:Ventricular Premature Complexes
ARRHYTHMIA/diagnosis; ELECTROCARDIOGRAPHY