cardiac involvement , therefore , has not been convincingly reported in facioscapulohumeral muscular dystrophy , but because of the clinical similarity of that disorder to emery-dreifuss dystrophy and its genetic variants , a prospective investigation of the electrophysiologic properties of the atria and atrioventricular ( av ) node and infranodal conduction was undertaken in 30 rigorously documented cases of facioscapulohumeral muscular dystrophy .
C0018787
cardiac
C0018792
atria