Heterozygous familial hypercholesterolemia (HeFH) is an autosomal dominant disease caused by genetic mutations in the LDL receptor (LDLR), its ligand apolipoprotein B (Apo B), or proprotein convertase subtilisin/kexin type 9 (PCSK9) [1]. The gene discussed is PCSK9; the disease is autosomal dominant disease.