long QT syndrome

condition involving delayed repolarization of the heart during the heartbeat cycle
MedicalCondition rare_disease Q653924
long QT syndrome
Created by Agateller (Anthony Atkielski), converted to svg by atom. · Public Domain · Wikimedia
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Summary

long QT syndrome is a rare disease[1]. It ranks in the top 9% of rare disease entities by monthly Wikipedia readership (3,708 views/month).[2]

Key Facts

  • Instance of: class of disease[3]
  • Subclass of: heart arrhythmia[4], intrinsic cardiomyopathy[5], QT interval prolonged[6]
  • Commons category: Long QT syndrome[7]
  • Opposite of: short QT syndrome[8]
  • Symptoms and signs: heart arrhythmia[9]
  • ICD-9-CM: 426.82[10]
  • NCI Thesaurus ID: C85049[11], C34786[12]
  • Health specialty: cardiology[13]
  • Drug or therapy used for treatment: nadolol[14]
  • Genetic association: KCNQ1[15], CALM1[16], CALM2[17], CALM3[18], KCNH2[19]
  • Exact match: http://purl.obolibrary.org/obo/DOID_2843[20], http://identifiers.org/doid/DOID:2843[21], http://www.orpha.net/ORDO/Orphanet_768[22]
  • On focus list of Wikimedia project: WikiProject Medicine[23]
  • Possible medical findings: QT interval prolonged[24]
  • Has phenotype: torsades de pointes[25]
  • P14541: 1WdxIQ[26]

Why It Matters

long QT syndrome has Wikipedia articles in 21 language editions, a strong signal of global cultural recognition.[27] It is known by 31 alternative names across languages and contexts.[28]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . The Arrhythmogenic Calmodulin Mutation D129G Dysregulates Cell Growth, Calmodulin-dependent Kinase II Activity, and Cardiac Function in Zebrafish. wikidata.org.
  3. [5] ↑ . Disease Ontology. Retrieved . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . Disease Ontology. Retrieved . wikidata.org.
  8. [10] ↑ . Disease Ontology. Retrieved . wikidata.org.
  9. [11] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  10. [12] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . Drug Indications Extracted from FAERS. Retrieved . wikidata.org.
  13. [15] ↑ . Positional cloning of a novel potassium channel gene: KVLQT1 mutations cause cardiac arrhythmias. Retrieved . search.clinicalgenome.org. Provenance: wikidata.org.
  14. [16] ↑ . ClinGen. Retrieved . search.clinicalgenome.org. Provenance: wikidata.org.
  15. [17] ↑ . ClinGen. Retrieved . search.clinicalgenome.org. Provenance: wikidata.org.
  16. [18] ↑ . ClinGen. Retrieved . search.clinicalgenome.org. Provenance: wikidata.org.
  17. [19] ↑ . ClinGen. Retrieved . search.clinicalgenome.org. Provenance: wikidata.org.
  18. [20] ↑ . Disease Ontology. Retrieved . wikidata.org.
  19. [21] ↑ . Identifiers.org. registry.identifiers.org. Provenance: wikidata.org.
  20. [22] ↑ . Orphanet Rare Disease Ontology. orpha.net. Provenance: wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . Disease Ontology. Retrieved . wikidata.org.
  24. [26] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [27] ↑ . Wikidata sitelinks. wikidata.org.
  3. [28] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). long QT syndrome. Retrieved October 16, 2026, from https://4ort.xyz/entity/long-qt-syndrome
MLA “long QT syndrome.” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 2026, https://4ort.xyz/entity/long-qt-syndrome.
BibTeX @misc{4ortxyz_long-qt-syndrome_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{long QT syndrome}}, year = {2026}, url = {https://4ort.xyz/entity/long-qt-syndrome}, note = {Accessed: 2026-10-16}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): long QT syndrome — https://4ort.xyz/entity/long-qt-syndrome (retrieved 2026-10-16)

Canonical URL: https://4ort.xyz/entity/long-qt-syndrome · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 3d ago · VGMaintenanceBot bot · 2026-10-13 view diff on Wikidata ↗
    Wikipedia languages → ['ar', 'bs', 'ca', 'commons', 'de', 'en', 'es', 'fa', 'fi', 'fr', 'he', 'hy', 'i
    Claims rich → —
    "/* wbsetqualifier-add:1| */ Mediawiki page id: 1242, Add qualifier to WikiProjectMed ID `Long QT syndrome`"
  2. 14w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 1WdxIQ
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  3. 15w ago · JhealdBatch bot · 2026-07-03 view diff on Wikidata ↗
    Subclass of → heart arrhythmia, intrinsic cardiomyopathy, QT interval prolonged
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/39732|batch #39732]]: rm redundant subclass"
  4. 21w ago · Twofivesixbot bot · 2026-05-20 view diff on Wikidata ↗
    Possible medical findings → QT interval prolonged
    On focus list of wikimedia project → WikiProject Medicine
    Instance of → —
    Subclass of → heart arrhythmia, intrinsic cardiomyopathy, QT interval prolonged
    + 9 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|10 */ Yso id: 21696, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.