title: Left bundle branch block due to hyperkalemia in premature infants.
mesh_terms: D002037:Bundle-Branch Block / Q000209:etiology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D006947:Hyperkalemia / Q000150:complications*; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases