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Results 1 - 1 of 1 for Abnormal heart rate variability
  1. 48,XXYY syndrome 
    ... may have flat feet (pes planus), elbow abnormalities, abnormal fusion of certain bones in the forearm (radioulnar synostosis), allergies, asthma, type 2 diabetes, seizures, congenital heart defects, and an inflammatory condition in the throat ( ...
    https://medlineplus.gov/genetics/condition/48xxyy-syndrome - Genetics