ArticleFrontiers in physiology2022
Short-Term Beat-to-Beat QT Variability Appears Influenced More Strongly by Recording Quality Than by Beat-to-Beat RR Variability.
Article in Frontiers in physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed, 6 citations in OpenAlex.
- Beat-to-Beat QT Variability: A Population Study of the QT Variability Index Composition.Diagnostics (Basel, Switzerland) · 2026Article
- Habitual sleep duration and QT variability index: Correlates of ventricular repolarization lability and all-cause mortality.Heart rhythm · 2026Article
- Intra-subject covariates of QT variability indices: influence of ECG noise.Frontiers in physiology · 2026Article
- Prognostic significance of the Tpe/Qtc ratio in predicting major adverse cardiac events in acute STEMI patients.Scientific reports · 2025Article
- Intra-subject stability of different expressions of spatial QRS-T angle and their relationship to heart rate.Frontiers in physiology · 2022Article
Corrections and comments
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Authors and funding
10 authors at 5 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Increases in beat-to-beat variability of electrocardiographic QT interval duration have repeatedly been associated with increased risk of cardiovascular events and complications. The measurements of QT variability are frequently normalized for the underlying RR interval variability. Such normalization supports the concept of the so-called immediate RR effect which relates each QT interval to the preceding RR interval. The validity of this concept was investigated in the present study together with the analysis of the influence of electrocardiographic morphological stability on QT variability measurements. The analyses involved QT and RR measurements in 6,114,562 individual beats of 642,708 separate 10-s ECG samples recorded in 523 healthy volunteers (259 females). Only beats with high morphology correlation (
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