title: End-diastolic ventricular extrasystoles with varying degrees of ventricular fusion.
mesh_terms: D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged