Browsing raw data in 23andMe for the first three genes of each condition listed in Table 3, the PGx service includes 33 SNPs in MYBPC3, 52 SNPs in MYH7, and 30 SNPs in TNNT2 (three genes on ACMG’s list for HCM); 271 SNPs in KCNQ1, 50 SNPs in KCNH2, and 116 SNPs in SCN5A (three genes on ACMG’s list for LQTS and related arrhythmias); and 139 SNPs in FBN1, 26 SNPs in TGFBR1, and 75 SNPs in TGFBR2 (three genes on ACMG’s list for MFS and related disorders). Here, MYBPC3 is linked to familial long QT syndrome.