title: TRANSIENT FIRST AND SECOND DEGREE HEART BLOCK WITH WENCKEBACH PHENOMENON WITHOUT ORGANIC HEART DISEASE.
mesh_terms: D000293:Adolescent; D002318:Cardiovascular Diseases; D003933:Diagnosis; D004562:Electrocardiography; D006327:Heart Block; D006331:Heart Diseases; D006801:Humans
keywords: ADOLESCENCE; DIAGNOSIS; ELECTROCARDIOGRAPHY; HEART BLOCK