title: [RSR' IN THE V-1 LEAD].
mesh_terms: D004562:Electrocardiography; D006327:Heart Block; D006801:Humans; D008946:Mitral Valve Stenosis; D013610:Tachycardia; D013614:Tachycardia, Paroxysmal
keywords: ELECTROCARDIOGRAPHY; HEART BLOCK; MITRAL VALVE STENOSIS; TACHYCARDIA, PAROXYSMAL
vernacular_title: RSR' W ODPROWADZENIU V-1.