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. 2012 May 3;4:e4f9995f69e6c7. [Version 1] doi: 10.1371/4f9995f69e6c7

Table of Cardiac Ion Channelopathies.

Long QT syndrome (LQTS) 17 26 27 28 75 Short QT syndrome (SQTS) 17 18 29 Catecholaminergic polymorphic ventricular tachycardia (CPVT) 5 17 30 31 Brugada syndrome (BrS) 17 32 33 34 35
Prevalence 1:5,000 to 1:2,000 Rare - fewer than 30 cases published 1:7,000 to 1:10,000 1:800 (Japan); 1:6,000 (U.S. & Europe) type 1 ECG pattern
Annual mortality rate 0.3% (LQT1)
0.6% (LQT2)
0.56% (LQT3)		 Unidentified 3.1% 4% (pts. with type 1 ECG pattern)
Mean age of first event 14 ± 12 yrs. 40 ± 24 yrs. 15 ± 10 yrs. 42 ± 16 yrs. (pts. with type 1 ECG)
Diagnostic Yield - Genetic Testing 75-80% 15-20% 65-75% 11-40% (see Clinical Validity)