A Case of Unusual Form of Williams Syndrome

Williams syndrome is a progressive and multisystemic disorder. We experienced one case of Willams syndrome which was characterized by elfin facies, mental retardation, diffuse aortic hypoplasia, mitral regurgitation and chronic nonparoxysmal sinus tachycardia. The tachycardia has been managing with beta-blocker successfully. We presented a case of unusual form of Williams syndrome with a reivew of literatures.