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- W2053559419 abstract "Previous studies that assessed the risk of life-threatening cardiac events in patients with congenital long-QT syndrome (LQTS) have focused mainly on the first 4 decades of life, whereas the clinical course of this inherited cardiac disorder in the older population has not been studied.The risk of aborted cardiac arrest or death from age 41 though 75 years was assessed in 2759 subjects from the International LQTS Registry, categorized into electrocardiographically affected (corrected QT interval [QTc] > or = 470 ms), borderline (QTc 440 to 469 ms), and unaffected (QTc < 440 ms) subgroups. The affected versus unaffected adjusted hazard ratio for aborted cardiac arrest or death was 2.65 (P<0.001) in the age range of 41 to 60 years and 1.23 (P=0.31) in the age range of 61 to 75 years. The clinical course of study subjects displayed gender differences: Affected LQTS women experienced a significantly higher cumulative event rate (26%) than borderline (16%) and unaffected (12%) women (P=0.001), whereas event rates were similar among the 3 respective subgroups of men (29%, 26%, and 27%; P=0.16). Recent syncope (< 2 years in the past) was the predominant risk factor in affected subjects (hazard ratio 9.92, P<0.001), and the LQT3 genotype was identified as the most powerful predictor of outcome in a subset of 871 study subjects who were genetically tested for a known LQTS mutation (hazard ratio 4.76, P=0.02).LQTS subjects maintain a high risk for life-threatening cardiac events after age 40 years. The phenotypic expression of affected subjects is influenced by age-specific factors related to gender, clinical history, and the LQTS genotype." @default.
- W2053559419 created "2016-06-24" @default.
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- W2053559419 date "2008-04-29" @default.
- W2053559419 modified "2023-10-14" @default.
- W2053559419 title "Long-QT Syndrome After Age 40" @default.
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- W2053559419 doi "https://doi.org/10.1161/circulationaha.107.729368" @default.
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