Review Article
Genetics of Atrial Fibrillation and Possible Implications for Ischemic Stroke
Table 1
Genetics of atrial fibrillation.
| | Gene/Locus | Mechanism of action | Study design/Inheritance |
| Sodium channels | SCNA5 [8–17] | Cellular hyperexcitability (gain-of-function) as well as prolongation of the atrial action potential duration (loss-of-function) | Candidate gene/Familial and sporadic | SCN1B/SCN2B [18] | Decreased peak sodium current amplitude | Candidate gene/Sporadic |
| Potassium channels | KCNQ1 [19–22] | Enhanced atrial action potential repolarization | Linkage/Familial | KCNE2 [23] | Enhanced atrial action potential repolarization | Candidate gene/Familial | KCNJ2 [24] | Enhanced atrial action potential repolarization | Candidate gene/Familial | KCNE5 [25] | Enhanced atrial action potential repolarization | Candidate gene/Familial and sporadic | KCNA5 [26–28] | Delayed atrial action potential repolarization | Candidate gene/Familial and sporadic |
| Other | NPPA [29] | Shortening of the atrial action potential duration | Linkage/Familial | GJA5 [30–32] | Dispersion of conduction velocity | Candidate gene/Sporadic | 10q22 [33] | Unknown | Linkage/Familial | 6q14–16 [34] | Unknown | Linkage/Familial | 5p15 [35] | Unknown | Linkage/Familial | 4q25 (PITX2) [36, 37] | Unknown | Genome wide association/Sporadic | 16q22 (ZFHX3) [38] | Unknown | Genome wide association/Sporadic | 1q21 (KCNN3) [39] | Unknown | Genome wide association/Sporadic |
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