Problemi speciali
La sindrome del QT lungo
The long QT syndrome
Giovanna Ferrara1, Emanuela Berton2, Claudio Germani3, Pierluigi Marzuillo4, Paolo Bonazza5, Raffaele D’alfonso5, Egidio Barbi3
1UCO Clinica Pediatrica, 2SS DPT Cardiologia, 3SC Pediatria d’urgenza e Pronto Soccorso Pediatrico,
IRCCS Materno-Infantile “Burlo Garofolo”, Trieste
4Scuola di Specializzazione in Pediatria - Seconda Università di Napoli
5Pediatra, ASL 9 Grosseto
Gennaio 2014 - pagg. 33 -40
Abstract
The long QT syndrome (LQTS) is an arrhythmogenic syndrome due to cardiac ion channel
disorders characterized by prolonged QT interval on ECG (QTc >440 ms for male,
>460 ms for female) and the most common presentations are syncope, seizures, cardiac
arrest and sudden death. Many different congenital forms have been identified but also
an acquired form due to specific drugs, hypokalaemia, or hypomagnesemia is known.
Familiarity is the leading risk factor. LQTS should be suspected in case of any syncope
in order to perform ECG and start proper therapy. To identify and remove risk factors it
is necessary to avoid potentially life-threatening arrhythmia in these patients.
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Suggerite dall'AI
Classificazione MeSH
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Bibliografia
1. Vincent GM. The molecular genetics of the
long QT syndrome: genes causing fainting
and sudden death. Annu Rev Med 1998;49:
263-74.
2. Tester DJ, Ackerman MJ. Novel gene and
mutation discovery in congenital long QT syndrome:
let’s keep looking where the street
lamp standeth. Heart Rhythm 2008;5:1282-4.
3. Tester DJ, Will ML, Haglund CM, et al.
Compendium of cardiac channel mutations in
541 consecutive unrelated patients referred
for long QT syndrome genetic testing. Heart
Rhythm 2005;2:507-17.
4. Cerrone M, Priori SG. Genetics of sudden
death: focus on inherited channelopathies.
Eur Heart J 2011;32:2109-18.
5. Webster G, Berul CI. Congenital long-QT
syndromes: a clinical and genetic update from
infancy through adulthood. Trends Cardiovasc
Med 2008;18:216-24.
6. Chopra N. Knollmann BJ. Genetics of sudden
cardiac death syndromes. Curr Opin Cardiol
2011;26:196-203.
7. Splawski I, Shen J, Timothy KW, et al. Spectrum
of mutations in long-QT syndrome
genes. KVLQT1, HERG, SCN5A, KCNE1, and
KCNE2. Circulation 2000;102:1178-85.
8. Czosek RJ, Berul CI. Congenital long-QT
syndrome concealed by hypercalcemia in
Williams syndrome. J Cardiovasc Electrophysiol
2008;19:1322-4.
9. Kannankeril PJ. Understanding drug induced
torsades de pointes: a genetic. Expert
Opin Drug Saf 2008;7:231-9.
10. Vohra J. The Long QT Syndrome. Heart
Lung Circ 2007;16 Suppl 3:S5-12.
11. Schwartz PJ, Stramba-Badiale M, Crotti L,
et al. Prevalence of the congenital long-QT
syndrome. Circulation 2009;120:1761-7.
12. Hancox JC, James AF. Refining insights into
high-affinity drug binding to the human
ether-a-go-go-related gene potassium channel.
Mol Pharmacol 2008;73:1592-5.
13. Kallergis EM, Goudis CA, Simantirakis
EN, Kochiadakis GE, Vardas PE. Mechanisms,
risk factors, and management of acquired
long QT syndrome: a comprehensive
review. Scientific World Journal 2012;2012:
212178.
14. Drew BJ, Ackerman MJ, Funk M, et al.
Prevention of torsade de pointes in hospital
settings a scientific statement from the American
Heart Association and the American College
of Cardiology Foundation. Circulation
2010;121:1047-60.
15. Heist EK, Ruskin JN. Drug-induced arrhythmia.
Circulation 2010;122:1426-35.
16. Straus SM, Sturkenboom MC, Bleumink
GS, et al. Non-cardiac QTc prolonging drugs
and the risk of sudden cardiac death. Eur
Heart J 2005;26:2007-12.
17. Hill SL, Evangelista JK, Pizzi AM. Proarrhythmia
associated with cisapride in children.
Pediatrics 1998;101:1053-6.
18. Ray W, Murray KT, Meredith S. Oral erythromycin
and the risk of sudden death from
cardiac causes. N Engl J Med 2004;351:1089-96.
19. Esch JJ, Kantoch MJ. Torsades de pointes
ventricular tachycardia in a pediatric patient
treated with fluconazole. Pediatr Cardiol
2008;29:210-3.
20. Bagatell R, Hainstock M, Lowe MC. The
perfect storm: Torsades de pointes in
a child with leukemia. Pediatr Blood Cancer
2007;49:996-9.
21. Aypar E, Kendirli T, Tutar E, et al. Voriconazole-
induced QT interval prolongation and
torsades de pointes. Pediatr Int 2011; 53:761-3.
22. Ghosh A, Agarwala BN. Torsades de pointes
in a child. Pediatr Cardiol 2009;30:553-4.
23. Johnson J.N, Hofman N, Haglund CM, et
al. Identification of a possible pathogenic link
between congenital long QT syndrome and
epilepsy. Neurology 2009;72:224-31.
24. Berne P, Brugada J. Brugada Syndrome
2012. Circ J 2012;76:1563-71.
25. Copertino M, Marchetti F, Benettoni A,
Berton E, Gombacci A, Ventura A. Tante sincopi
con l’angoscia di correre. Medico e Bambino
2009;28:105-11.
26. Massin MM, Malekzadeh-Milani S, Benatar
A. Cardiac syncope in pediatric patients.
Clin Cardiol 2007;30:81-5.
27. La sincope in età pediatrica - Linee Guida a
cura di SIP, SIMEUP, SICP, FMSI, AIAC, SIC
Sport, FIMP, GSCP, GSMESPO, SINPIA, LICE,
SINC, SINP. Prospettive in Pediatria 2009;
39(155):180-95.
28. Goldenberg I, Moss AJ, Bradley J, et al.
Long-QT syndrome after age 40. Circulation
2008;117:2192-201.
29. Roden DM. Clinical practice. Long-QT syndrome.
N Engl J Med 2008;358:169-76.
30. Vyas H, Hejlik J, Ackerman MJ. Epinephrine
QT stress testing in the evaluation of congenital
long-QT syndrome: diagnostic accuracy
of the paradoxical QT response. Circulation
2006;113:1385-92.
31. Schwartz PJ, Stramba-Bariale M, Segantini
A, et al. Prolungation of the QT interval and
the sudden infant death syndrome. N Engl J
Med 1998;338:1709-14.
32. Kaye P, O’Sullivan I. The role of magnesium
in the emergency department. Emerg
Med J 2002;19:288-91.
33. Sauer AJ, Moss AJ, McNitt S, et al. Long
QT syndrome in adults. J Am Coll Cardiol
2007;49:329-37.
34. Priori SG, Napolitano C, Schwartz PJ, et
al. The elusive link between LQT3 and Brugada
syndrome: the role of flecainide challenge.
Circulation 2000;102:945-7.
35. Makita N, Behr E, Shimizu W, et al. Overlap
between LQT3 and Brugada syndrome:
clinical features in a common mutation and
underlying biophysical mechanisms. Circulation
2007;116:II_490.
36. Collins S, Widger J, Davis A, Massie J. Management
of asthma in children with long QT
syndrome. Paediatr Respir Rev 2012;13: 100-5.
37. Moss AJ, McDonald J. Unilateral cervicothoracic
sympathetic ganglionectomy for
the treatment of long QT interval syndrome. N
Engl J Med 1971;285:903-4.
38. Epstein AE, DiMarco JP, Ellenbogen KA,
et al. ACC/AHA/HRS 2008 Guidelines for Device
Based Therapy of Cardiac Rhythm Abnormalities:
a report of the American College
of Cardiology/American Heart Association
Task Force on Practice Guidelines (Writing
Committee to Revise the ACC/AHA/NASPE
2002 Guideline Update for Implantation of
Cardiac Pacemakers and Antiarrhythmia Devices):
developed in collaboration with the
American Association for Thoracic Surgery
and Society of Thoracic Surgeons. Circulation
2008;117:e350-e408.
39. Orphanet, Urgenza Qt lungo. https://
www.orpha.net/data/patho/Pro/it/Urgenza-
QTlungo.pdf.
40. Mikesell C, Atkinson A, Rachman B. Prolonged
QT syndrome and sedation. Pediatr
Emerg Care 2011;27:129-31.
Corrispondenza: giovanna.ferrara@gmail.com
