title: [Mechanism of irregular heart beat].
mesh_terms: D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004562:Electrocardiography; D006321:Heart / Q000033:anatomy & histology; D006325:Heart Atria / Q000033:anatomy & histology / Q000503:physiopathology; D006329:Heart Conduction System / Q000033:anatomy & histology / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008208:Lymphatic System / Q000503:physiopathology; D012849:Sinoatrial Node / Q000033:anatomy & histology / Q000503:physiopathology; D014672:Vectorcardiography