title: Interpretation and significance of supraventricular arrhythmia with abnormal QRS complex.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology; D006329:Heart Conduction System; D006801:Humans; D013610:Tachycardia / Q000503:physiopathology