Version June 2024
| Gene | Locus | Protein |
| Major LQTS genes | ||
| KCNQ1 (LQT1) | 11p15.5 | IKs potassium channel alpha subunit (KVLQT1, Kv7.1) |
| KCNH2 (LQT2) | 7q35-36 | IKr potassium channel alpha subunit (HERG, Kv11.1) |
| SCN5A (LQT3) | 3p21-p24 | Cardiac sodium channel alpha subunit (NaV1.5) |
| Minor LQTS genes | ||
| AKAP9 | 7q21-q22 | Yotiao |
| CACNA1C | 12p13.3 | Voltage gated L-type calcium channel (CaV1.2) |
| CALM1 | 14q32.11 | Calmodulin 1 |
| CALM2 | 2p21 | Calmodulin 2 |
| CALM3 | 19q13.2-q13.3 | Calmodulin 3 |
| CAV3 | 3p25 | Caveolin-3 |
| KCNE1 | 21q22.1 | Potassium channel beta subunit (MinK) |
| KCNE2 | 21q22.1 | Potassium channel beta subunit (MiRP1) |
| KCNJ5 | 11q24.3 | Kir3.4 subunit of IKACH channel |
| SCN4B | 11q23.3 | Sodium channel beta 4 subunit |
| SNTA1 | 20q11.2 | Syntrophin-alpha 1 |
| TRDN | 6q22.31 | Triadin |
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