[IMPORTANCE OF THE 1ST DERIVATIVE OF THE ELECTROCARDIOGRAM].
D002037:Bundle-Branch Block; D000075224:Cardiac Conduction System Disease; D006332:Cardiomegaly; D004562:Electrocardiography; D006327:Heart Block; D006801:Humans; D009203:Myocardial Infarction
BUNDLE-BRANCH BLOCK; ELECTROCARDIOGRAPHY; HEART ENLARGEMENT; MYOCARDIAL INFARCT
INT'ER ET DE LA PREMI'ERE D'ERIV'EE DE L''ELECTROCARDIOGRAMME.