MedGen

An autosomal anomaly with characteristics of variable clinical features, most commonly including significant intrauterine and postnatal growth failure, developmental delay, intellectual disability, microcephaly and dysmorphic facial features. Some less frequent clinical features are dysgenesis of corpus callosum, atrial septal defect, rocker bottom feet and clinodactyly. [from SNOMEDCT_US]

An autosomal anomaly with characteristics of variable clinical features, most commonly including significant intrauterine and postnatal growth retardation, developmental delay, intellectual disability, microcephaly, and dysmorphic facial features. Some less frequent features are cleft lip and/or cleft palate, congenital cardiovascular, gastrointestinal and genitourinary system anomalies. [from SNOMEDCT_US]

Lown-Ganong-Levine syndrome is an extremely rare conduction disorder characterized by a short PR interval (less than or equal to 120 ms) with normal QRS complex on electrocardiogram associated with the occurrence of episodes of atrial tachyarrythmias (e.g. atrial fibrillation, atrial tachycardia). [from ORDO]