Mean and Cut-Off Values of the Corrected QT Interval From Childhood to Adolescence
Hiroshi Suzuki, Junichi Ozawa, Yoko M. Nakao, Koji Kawakami · 2026
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Description
Hiroshi Suzuki, Junichi Ozawa, Yoko M. Nakao, and Koji Kawakami set out, in a 2026 study, to pin down normal heart tracing values for children as they grow. The corrected QT interval, a timing span on the heart tracing, is the key screen for long QT syndrome, a cause of sudden death in the young. The team re-read tracings from school screening programs.
Fourth graders formed the core group, with 2,753 children, joined by smaller sets of first and seventh graders. In first grade, boys and girls shared the same average values. By fourth grade, boys' values ran significantly shorter than girls' under both correction formulas. The team derived age- and sex-specific cutoffs from the top fraction of values. Their conclusion is practical: screening children demands cutoffs matched to age and sex, since one fixed line misjudges growing hearts.
Catalog record
| CREATOR | Hiroshi Suzuki, Junichi Ozawa, Yoko M. Nakao, Koji Kawakami |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 33408 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |