[Importance of the electrocardiographic concept of critical frequency from the diagnostic and therapeutic viewpoint in pediatric practice].
D002648:Child; D004562:Electrocardiography; D006333:Heart Failure; D006801:Humans; D007223:Infant; D010372:Pediatrics; D013610:Tachycardia
ELECTROCARDIOGRAPHY/in infancy and childhood; HEART FAILURE, CONGESTIVE/in infancy and childhood; TACHYCARDIA/in infancy and childhood