Evidence map›Paper›PMID 22467990›Full record

ArticleSleep2012

Abnormal sleep-cardiovascular system interaction in narcolepsy with cataplexy: effects of hypocretin deficiency in humans.

Daniela Grimaldi, Giovanna Calandra-Buonaura, Federica Provini, Patrizia Agati, Giulia Pierangeli, Christian Franceschini, Giorgio Barletta, Giuseppe Plazzi, Pasquale Montagna, Pietro Cortelli

Open access · bronzeAbstract read
In one paragraph

Article in Sleep, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
3.7field-weighted citation impact, top 6% 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

48 citing papers in PubMed, 102 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Cardiovascular risk in narcolepsy: Comparison of type 1 and type 2 in a real-world cohort.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2026
    Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Narcolepsy and rapid eye movement sleep.Journal of sleep research · 2025
    Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Review
  16. Review
  17. Review
  18. Disrupted nighttime sleep and sleep instability in narcolepsy.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2022
    Review
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 2 institutions in 1 country.

Daniela GrimaldiIRRCS Institute of Neurological Sciences, University of Bologna, Italy. daniela.grimaldi@unibo.it
Giovanna Calandra-Buonaura
Federica Provini
Patrizia Agati
Giulia Pierangeli
Christian Franceschini
Giorgio Barletta
Giuseppe Plazzi
Pasquale Montagna
Pietro Cortelli
Institute of Neurological Sciences · ITUniversity of Bologna · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectiveNarcolepsy with cataplexy (NC) is associated with loss of hypocretin neurons in the lateral hypothalamus involved in the circadian timing of sleep and wakefulness, and many biologic functions including autonomic control. The authors investigated whether chronic lack of hypocretin signaling alters cardiovascular control during sleep in humans.

designComparison of 24-hr circadian rhythms, day-night, time- and state-dependent changes of blood pressure (BP) and heart rate (HR) in drug-free patients with NC and control subjects.

settingUniversity hospital. PATIENTS OR

participantsTen drug-free patients with NC (9 men, 1 woman) and 12 control subjects (9 men, 3 women).

interventionsN/A. MEASUREMENTS AND

resultsDaytime BP was comparable in patients with NC and controls, but patients with NC displayed a nighttime nondipping BP pattern. The 24-hr circadian rhythmicity of BP and HR was normal in both groups. Systolic BP during nighttime rapid eye movement sleep was significantly increased in the NC group. The 24-hr HR was significantly higher in the NC group but the day-night and state-dependent HR modulations were intact. The nighttime BP pattern coupled in the NC group with increased sleep fragmentation and a higher prevalence of arousals, periodic limb movements in sleep (PLMS), and PLMS arousals. In an analysis of the sleep/cardiovascular interaction in the periods after sleep onset and preceding morning awakening, only PLMS were consistently associated with the blunted nighttime decrease in BP in the NC group.

conclusionsHypocretin deficiency in humans may couple with an altered nighttime BP regulation that can be associated with an increased cardiovascular risk. This finding may be the result not only of the hypocretinergic deficiency per se but also of the altered sleep/wake regulation characterizing NC.

Indexed as

AdultArousalBlood PressureCase-Control StudiesCataplexyCircadian RhythmFemaleHeart RateHumansIntracellular Signaling Peptides and ProteinsMaleMiddle AgedNeuropeptidesOrexinsSleep StagesIntracellular Signaling Peptides and ProteinsNeuropeptidesOrexinscardiovascular systemhypocretinsNarcolepsysleep

Identifiers

PMID22467990
PMCPMC3296794
OpenAlexW2072567022

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.