title: Influence of atrial mass on amplitude and duration of the P wave.
mesh_terms: D016275:Atrial Function; D004562:Electrocardiography; D006325:Heart Atria / Q000033:anatomy & histology*; D006329:Heart Conduction System / Q000502:physiology*; D016027:Heart Transplantation; D006801:Humans; D013997:Time Factors; D014184:Transplantation, Homologous