''Drop attacks'' in cyanotic congenital heart-disease.
D005684:Gait; D006331:Heart Diseases; D006333:Heart Failure / Q000150:complications*; D006801:Humans; D000860:Hypoxia; D009461:Neurologic Manifestations; D013575:Syncope
GAIT; HEART FAILURE, CONGESTIVE/complications; NEUROLOGIC MANIFESTATIONS