Evidence map›Paper›PMID 26118557›Full record

ArticleSleep2015

Obstructive Sleep Apnea in Patients with Congenital Long QT Syndrome: Implications for Increased Risk of Sudden Cardiac Death.

Abu S Shamsuzzaman, Virend K Somers, Timothy K Knilans, Michael J Ackerman, Yu Wang, Raouf S Amin

Open access · bronzeAbstract read
In one paragraph

Article in Sleep, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 3 pooled it
4.5field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 3 syntheses or guidelines pooled it, 46 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Guideline
  4. Trial
  5. Sleep, Neural Circulatory Control, and Cardiovascular Disease: A Mechanistic Review.Arteriosclerosis, thrombosis, and vascular biology · 2026
    Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Observational
  12. Article
  13. Sleep Apnea and Sudden Cardiac Death.Circulation reports · 2019
    Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Abu S ShamsuzzamanDivision of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
Virend K SomersDepartment of Medicine, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN.
Timothy K KnilansDepartment of Pediatrics, University of Cincinnati, Cincinnati, OH.
Michael J AckermanDepartment of Medicine, Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN.
Yu WangDivision of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
Raouf S AminDivision of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
Cincinnati Children's Hospital Medical Center · USMayo Clinic · USMayo Clinic in Arizona · USUniversity of Cincinnati · US

Funding

Disease Mechanisms in Sleep ApneaR01HL065176 · NHLBI · MAYO CLINIC ROCHESTER · PI SOMERS, VIREND K · 1999 to 2021
$5.8M
Neural Circulatory Control in the Long QT SyndromeR01HL070302 · NHLBI · MAYO CLINIC ROCHESTER · PI SOMERS, VIREND K · 2002 to 2006
$1.6M
NHLBI NIH HHS HL065176NHLBI NIH HHS HL070302NHLBI NIH HHS R01 HL065176NHLBI NIH HHS R01 HL070302
6 · The paper itself

Abstract

backgroundCongenital long QT syndrome (LQTS) is a familial arrhythmogenic cardiac channelopathy characterized by prolonged ventricular repolarization and increased risk of torsades de pointes-mediated syncope, seizures, and sudden cardiac death (SCD). QT prolongation corrected for heart rate (QTc) is an important diagnostic and prognostic feature in LQTS. Obstructive sleep apnea (OSA) has been increasingly implicated in the pathogenesis of cardiovascular disease, including arrhythmias and SCD. We tested the hypothesis that the presence of concomitant OSA in patients with LQTS is associated with increased QT intervals, both during sleep and while awake. METHODS AND

resultsPolysomnography with simultaneous overnight 12-lead electrocardiography (ECG) was recorded in 54 patients with congenital LQTS and 67 control subjects. OSA was diagnosed as apnea-hypopnea index (AHI) ≥ 5 events/h for adults and AHI > 1 event/h for children. RR and QT intervals were measured from the 12-lead surface ECG. QTc was determined by the Bazett formula. Respiratory disturbance index, AHI, and arousal index were significantly increased in patients with LQTS and with OSA compared to those without OSA and control subjects. QTc during different sleep stages and while awake was also significantly increased in patients with LQTS and OSA compared to those without OSA. Severity of OSA in patients with LQTS was directly associated with the degree of QTc.

conclusionsThe presence and severity of obstructive sleep apnea (OSA) in patients with congenital long QT syndrome (LQTS) is associated with increased QT prolongation corrected for heart rate, which is an important biomarker of sudden cardiac death (SCD). Treatment of OSA in LQTS patients may reduce QT prolongation, thus reducing the risk of LQT-triggered SCD.

Indexed as

Disease SusceptibilityAdolescentAdultArousalArrhythmias, CardiacBrugada SyndromeCardiac Conduction System DiseaseCase-Control StudiesDeath, Sudden, CardiacElectrocardiographyFemaleHeart Conduction SystemHeart RateHumansLong QT SyndromeMalehypoxialong-QT syndromesleep apneatorsade de pointes

Identifiers

PMID26118557
PMCPMC4481019
OpenAlexW2336014418

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.