Short QT syndrome classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Five variants of short QT syndrome have been characterized based upon the underlying genetic mutation, the electrocardiographic phenotype, and the clinical manifestations of the variant.
Classification
| Type | OMIM | Gene Location | Mutation | Protein | Notes | |
|---|---|---|---|---|---|---|
| 1 | SQTS 1[1][2] | 609620 | 7q 36.1 | Mutation in the KCNH2 gene causing gain of function of α-subunit Ikr | Kv11.1 | |
| 2 | SQTS 2[1][3] | 609621 | 11p15.5-p15.4 | Mutation in KCNQ1 causing gain of function of α-subunit Iks | Kv7.1 | |
| 3 | SQTS 3[1][4] | 609622 | 17q24.3 | Mutation in KCNJ2 gene causing gain of function of α-subunit IK1 | Kir2.1 | |
| 4 | SQTS 4[1][5] | 12p13.3 | Mutation in CACNB2b causing loss of function of α-subunit IL,Ca | Cav1.2 | ||
| 5 | SQTS 5[1][5] | 10p12 | Mutation in CACNA1c causing loss of function of β2-subunit IL,Ca | Cavβ2 |
Short QT syndrome type 1 (SQT1)
Short QT syndrome type 2 (SQT2)
Short QT syndrome type 3 (SQT3)
Short QT syndrome type 4 (SQT4)
Short QT syndrome type 5 (SQT5)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Hedley PL, Jørgensen P, Schlamowitz S, Wangari R, Moolman-Smook J, Brink PA; et al. (2009). "The genetic basis of long QT and short QT syndromes: a mutation update". Hum Mutat. 30 (11): 1486–511. doi:10.1002/humu.21106. PMID 19862833.
- ↑ Brugada R, Hong K, Dumaine R, Cordeiro J, Gaita F, Borggrefe M; et al. (2004). "Sudden death associated with short-QT syndrome linked to mutations in HERG". Circulation. 109 (1): 30–5. doi:10.1161/01.CIR.0000109482.92774.3A. PMID 14676148.
- ↑ Bellocq C, van Ginneken AC, Bezzina CR, Alders M, Escande D, Mannens MM; et al. (2004). "Mutation in the KCNQ1 gene leading to the short QT-interval syndrome". Circulation. 109 (20): 2394–7. doi:10.1161/01.CIR.0000130409.72142.FE. PMID 15159330.
- ↑ Priori SG, Pandit SV, Rivolta I, Berenfeld O, Ronchetti E, Dhamoon A; et al. (2005). "A novel form of short QT syndrome (SQT3) is caused by a mutation in the KCNJ2 gene". Circ Res. 96 (7): 800–7. doi:10.1161/01.RES.0000162101.76263.8c. PMID 15761194.
- ↑ 5.0 5.1 Antzelevitch C, Pollevick GD, Cordeiro JM, Casis O, Sanguinetti MC, Aizawa Y; et al. (2007). "Loss-of-function mutations in the cardiac calcium channel underlie a new clinical entity characterized by ST-segment elevation, short QT intervals, and sudden cardiac death". Circulation. 115 (4): 442–9. doi:10.1161/CIRCULATIONAHA.106.668392. PMC 1952683. PMID 17224476.