Rheumatic carditis causing acute trifascicular block.
D002037:Bundle-Branch Block / Q000209:etiology*; D002648:Child; D006801:Humans; D007538:Isoniazid / Q000627:therapeutic use; D008297:Male; D011241:Prednisone / Q000627:therapeutic use; D011736:Pyridoxine / Q000627:therapeutic use; D012214:Rheumatic Heart Disease / Q000150:complications* / Q000188:drug therapy
D011736:Pyridoxine; D007538:Isoniazid; D011241:Prednisone