GH1 and Arrhythmia: Chromosomal abnormalities have been associated with a range of clinical features, including sinus tachycardia, arrhythmia,[13] hematuria,[14] growth retardation,[15] and reduced plasma GH levels.[16] In this case, a 3.84 Mb deletion at chromosome 6q14.1 (identified through clinical assessment and laboratory findings) was classified as a pathogenic CNV.