Abstract
The hallmark of all long QT syndromes (LQTS) is an abnormal ventricular repolarization characterized by a prolonged QT interval on the electrocardiogram. LQTS have a drastically different prognosis whether or not they are congenital. Congenital Long QT syndrome is a rare cardiac disorder associating the occurrence of syncopes often triggered in adrenergic setting, like strenuous exercise or emotional stress (RODEN et al. 1996). Most of the times, syncopes result from polymorphic ventricular tachycardia, calledtorsades de pointes, that were described first by Dessertene who characterized their pause-dependency and their distinctive time-dependent change in electrical axis (DESSERTENNE 1966). They may degenerate into entricular fibrillation, possibly causing sudden death, and are remarkably prevented by ß-adrenergic antagonists. In fact, the clinical diagnosis of LQTS can be fairly difficult in the absence of typical rhythmic problems or if the QT interval remains within the normal limits (QTc<0.46s in women,or 0.45 s in men).
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Antzelevitch C, Sicouri S, Litovsky SH, Lukas A, Krishnan SC, Di DJ, Gintant GA, Liu DW (1991) Heterogeneity within the ventricular wall. Electrophysiology and pharmacology of epicardial, endocardial, and M cells. Circ Res 69:1427-1449
Antzelevitch C, Zhuo-Quian S, Zi-Qing Z, Gan-Xin Y (1996) Cellular and ionic mechanisms underlying erythromycin-induced long QT intervals and Torsade de Pointe. J Am Coll Cardiol 28:1836-1848
Apkon M, Nerbonne JM (1991) Characterization of two distinct depolarization-activated K+ currents in isolated adult rat ventricular myocytes. J Gen Physiol 97:973-1011
Attali B, Guillemare E, Lesage F, Honore E, Romey G, Lazdunski M, Barhanin J (1993) The protein IsK is a dual activator of K` and Cl-channels. Nature 365:850-852
Backx PH, Marban E (1993) Background potassium current active during the plateau of the action potential in Guinea-pig ventricular myocytes. Circ Res 72:890-900
Barhanin J, Attali B, Lazdunski M (1998) IKS, a very slow and very intriguing cardiac K+ channel and its associated long QT diseases. Trends CardiovascMed 8:207-214
Barhanin J, Lesage F, Guillemare E, Fink M, Lazdunski M, Romey G (1996) K(v)LQT1 and IsK (minK) proteins associate to form theIK,cardiac potassium current. Nature 384:78-80
Busch AE, Busch GL, Ford E, Suessbrich H, Lang HJ, Greger R, Kunzelmann K, Attali B, Stuhmer W (1997a) The role of the IsK protein in the specific pharmacological properties of theIK, channel complex. Br J Pharmacol 122:187-189
Busch AE, Suessbrich H (1997b) Role of the ISK protein in the IminK channel complex. Trends Pharmacol Sci 18:26-29
Chouabe C, Neyroud N, Guicheney P, Lazdunski M, Romey G, Barhanin J (1997) Properties of KvLQT1 K+ channel mutations in Romano-Ward and Jervell and Lange-Nielsen inherited cardiac arrhythmias. EMBO J 16:5472-5479
Choy AM, Lang CC, Chomsky DM, Rayos GH, Wilson JR, Roden DM (1997) Normalization of acquired QT prolongation in humans by intravenous potassium. Circulation 96:2149-2154
Curran ME, Splawski I, Timothy KW, Vincent GM, Green ED, Keating MT (1995) A molecular basis for cardiac arrhythmia: HERG mutations cause long QT syndrome. Cell 80:795-803
Davies MP, Doevendans P, An RH, Kubalak S, Chien KR, Kass RS (1996) Developmental changes in ionic channel activity in the embryonic murine heart. Circ Res 78:15-25
Deal KK, England SK,Tamkun MM (1996) Molecular physiology of cardiac potassium channels. Physiol Rev 76:49-67
Dessertenne F (1966) La tachycardie ventriculaire à deux foyers opposés variables. Arch Malcoeur 59:263-272
Donger C, Denjoy I, Berthet M, Neyroud N, Cruaud C, Bennaceur M, Chivoret G, Schwartz K, Coumel P, Guicheney P (1997) KVLQT1 C-terminal missense mutation causes a forme fruste long-QT syndrome. Circulation 96:2778-2781
Doyle DA, Cabral JM, Pfuetzner RA, Kuo AL, Gulbis JM, Cohen SL, Chait BT, MacKinnon R (1998) The structure of the potassium channel: Molecular basis of K+ conduction and selectivity. Science 280:69-77
Drici MD, Arrighi I, Chouabe C, Mann JR, Lazdunski M, Romey G, Barhanin J (1998) Involvment of IsK associated K+ channel in heart rate control of repolarization in a murine engineered model of Jervell and Lange-Nielsen syndrome. Circ Res 83:95-102
Drici MD, Burklow TR, Haridasse V, Glazer RI, Woosley RL (1996) Sex hormones prolong the QT interval and downregulate potassium channel expression in the rabbit heart. Circulation 94:1471-1474
Duggal P, Vesely MR, Wattanasirichaigoon D, Villafane J, Kaushik V, Beggs AH (1998) Mutation of the gene for IsK associated with both Jervell and Lange-Nielsen and Romano-Ward forms of Long-QT syndrome. Circulation 97:142-146
Duprat F, Lesage F, Fink M, Reyes R, Heurteaux C, Lazdunski M (1997) TASK, a human background K+ channel to sense external pH variations near physiological pH. EMBO J 16:5464-5471
Fiset C, Drolet B, Hamelin BA, Turgeon J (1997) Block ofIK, by the diuretic agent indapamide modulates cardiac electrophysiological effects of the class III antiarrhythmic drug dl-sotalol. J Pharmacol Exp Ther 283:148-156
Hauswirth O, Noble D, Tsien RW (1972) Separation of the pace-maker and plateau components of delayed rectification in cardiac Purkinje fibres. J Physiol 225:211-235
Heginbotham L, Lu Z, Abramson T, Mackinnon R (1994) Mutations in the K' channel signature sequence. Biophys J 66:1061-1067
Hirao H, Shimizu W, Kurita T, Suyama K, Aihara N, Kamakura S, Shimomura K (1996) Frequency-dependent electrophysiologic properties of ventricular repolarization in patients with congenital long QT syndrome. J Am Coll Cardiol 28:1269-1277
Honoré E, Attali B, Romey G, Heurteaux C, Ricard P, Lesage F, Lazdunski M, Barhanin J (1991) Cloning, expression, pharmacology and regulation of a delayed rectifier K' channel in mouse heart. EMBO J 10:2805-2811
Cast Investigators (1989) Preliminary report: effect of encainide and flecainide on mortality in a randomized trial arrhythmia suppression after myocardial infarction. N Engl J Med 321:406-412
Jervell A, Lange-Nielsen F (1957) Congenital deaf-mutism, functional heart disease with prolongation of Q-T interval and sudden death. Am Heart J 54:59-68
Jurkiewicz NK, Sanguinetti MC (1993) Rate-dependent prolongation of cardiac action potentials by a methanesulfonanilide class-III antiarrhythmic agent — specific block of rapidly activating delayed rectifier K'- current by dofetilide. Circ Res 72:75-83
Kaczmarek LK, Blumenthal EM (1997) Properties and regulation of the minK potassium channel protein. Physiol Rev 77:627-641
Krahn AD, Klein GJ, Yee R (1997) Hysteresis of the RT interval with exercise: a new marker for the long-QT syndrome? Circulation 96:1551-1556
Kupershmidt S, Sutherland M, King D, Magnuson MA, Roden DM (1996) Replacement by homologous recombination of the minK gene with LacZ reveals cell-specific minK expression (Abstract). Biophys J 72:A226
Li GR, Feng JL, Yue LX, Carrier M, Nattel S (1996) Evidence for two components of delayed rectifier K' current in human ventricular myocytes. Circ Res 78:689-696
Makkar RR, Fromm BS, Steinman RT, Meissner MD, Lehmann MH (1993) Female gender as a risk factor for torsades de pointes associated with cardiovascular drugs. JAMA 270:2590-2597
McDonald TV, Yu ZH, Ming Z, Palma E, Meyers MB, Wang KW, Goldstein SAN, Fishman GI (1997) A minK-HERG complex regulates the cardiac potassium current I-Kr. Nature 388:289-292
Nair LA, Grant AO (1997) Emerging class III antiarrhythmic agents: Mechanism of action and proarrhythmic potential. Cardiovasc Drug Therapy 11:149-167
Napolitano C, Priori S, Schwartz P, Cantù F, Paganini V, De Fusco M, Pinnavia A, Aquaro G, Casari G (1997) Identification of a long QT syndrome molecular defect in drug-induced torsade de pointes. Circulation 96:211 (Abstract)
Napolitano C, Priori SG, Schwartz PJ (1994) Torsade de pointes. Mechanisms and management. Drugs 47:51-65
Neyroud N, Denjoy I, Donger C, Villain E, Leenhardt A, Gary F, Coumel P, Schwartz K, Guicheney P (1998) A heterozygous mutation in the pore of the potassium channel gene KvLQT1 causes a benign phenotype in the long QT syndrome. Europ J Hum Genet 19(1):158-165
Neyroud N, Tesson F, Denjoy I, Leibovici M, Donger C, Barhanin J, Faure S, Gary F, Coumel P, Petit C, Schwartz K, Guicheney P (1997) A novel mutation in the potassium channel gene KVLQT1 causes the Jervell and Lange-Nielsen cardioauditory syndrome. Nature Genet 15:186-189
Noble D,Tsien RW (1969) Outward membrane currents activated in the plateau range of potential in cardiac Purkinje fibers. J Physiol 200:205-231
Priori SG, Napolitano C, Paganini V, Cantu F, Schwartz PJ (1997) Molecular biology of the long QT syndrome: Impact on management. Pac Clin Electrophys 20:2052-2057
Roden D (1994) Risks and benefits of antiarrhythmic drug therapy. N Engl J Med 331:785-791
Roden DM, Lazzara R, Rosen M, Schwartz PJ, Towbin J, Vincent GM (1996) Multiple mechanisms in the long-QT syndrome. Current knowledge, gaps, and future directions. The SADS Foundation Task Force on LQTS. Circulation 94:1996-2012
Romano C (1965) Congenital cardiac arrhythmia. (Letter) Lancet 1:658-659
Romey G, Attali B, Chouabe C, Abitbol I, Guillemare E, Barhanin J, Lazdunski M(1997) Molecular mechanism and functional significance of the MinK control of the KvLQT1 channel activity. J Biol Chem 272:16713-16716
Rosen MR (1998) Antiarrhythmic drugs: Rethinking targets, development strategies, and evaluation tools. Am J Cardiol 81:D21-D23
Salata JJ, Brooks RR (1997a) Pharmacology of azimilide dihydrochloride (NE-10064), a class III antiarrhthmic agent. Cardiov Drug Rev 15:137-156
Salata JJ, Jurkiewicz NK, Jow B, Folander K, Guinosso PJ, Raynor B, Swanson R, Fermini B (1996) IK Of rabbit ventricle is composed of two currents: Evidence for I-Ks. Amer J Physiol 40:H2477-H2489
Sanguinetti M, Keating M (1997a) Role ofdelayed rectifier potassium channels in cardiac repolarization and arrhythmias. NewPhysiol Sci 12:152-157
Sanguinetti MC, Spector PS (1997b) Potassium channelopathies. Neuropharmacology 36:755-762
Sanguinetti MC, Curran ME, Spector PS, Keating MT (1996a) Spectrum of HERG K+-channel dysfunction in an inherited cardiac arrhythmia. Proc. Natl. Acad Sci USA 93:2208-2212
Sanguinetti MC, Curran ME, Zou A, Shen J, Spector PS, Atkinson DL, Keating MT (1996b) Coassembly of K(v)LQTI and MinK (IsK) proteins to form cardiac IK, potassium channel. Nature 384:80-83
Sanguinetti MC, Jiang CG, Curran ME, Keating MT (1995) A mechanistic link between an inherited and an acquired cardiac arrhythmia: HERG encodes the IK, potassium channel. Cell 81:299-307
Sanguinetti MC, Jurkiewicz NK (1990) Two components of cardiac delayed rectifier K' current — Differential sensitivity to block by class-III antiarrhythmic agents. J Gen Physiol 96:195-215
Satoh T, Zipes DP (1996) Rapid rates during bradycardia prolong ventricular refractoriness and facilitate ventricular tachycardia induction with cesium in dogs. Circulation 94:217-227
Schott JJ, Charpentier F, Peltier S, Foley P, Drouin E, Bouhour JB, Donnelly P, Vergnaud G, Bachner L, Moisan JP (1995) Mapping of a gene for long QT syndrome to chromosome 4q25-27. Am J Hum Genet 57:1114-1122
Schulze-Bahr E, Wang Q, Wedekind H, Haverkamp W, Chen Q, Sun Y (1997) KCNE1 mutations cause jervell and Lange-Nielsen syndrome. Nature Genet 17:267-268
Shalaby FY, Levesque PC, Yang WP, Little WA, Conder ML, JenkinsWest T, Blanar MA (1997) Dominant-negative KVLQT1 mutations underlie the LQT1 form of long QT syndrome. Circulation 96:1733-1736
Splawski I, Timothy KW, Vincent GM, Atkinson DL, Keating MT (1997a) Molecular basis of the long-QT syndrome associated with deafness. N Engl J Med 336:1562-1567
Splawski I, Tristani-Firouzi M, Lehmannn MH, Sanguinetti MC, Keating MT (1997b) Mutations in hminK gene cause long-QT syndrome and suppressIK, function. Nature Genet 17:338-340
Takumi T, Moriyoshi K, Aramori I, Ishii T, Oiki S, Okada Y, Ohkubo H, Nakanishi S (1991) Alteration of Channel Activities and Gating by Mutations of Slow-IsK Potassium Channel. J Biol Chem 266:22192-22198
Turgeon J, Daleau P, Bennett PB, Wiggins SS, Selby L, Roden DM (1994) Block of IKs, the slow component of the delayed rectifier K' current, by the diuretic agent indapamide in guinea pig myocytes. Circ Res 75:879-886
Tyson J, Tranebjærg L, Bellman S, Wren C, Taylor J, Bathen J, Aslaksen B, SO-land SJ, Lund O, Malcolm S, Pembrey M, Bhattacharya S, Bitner-Glindzicz M (1997) IsK and KvLQT1: mutation in either of the two subunits of the slow component of the delayed rectifier potassium channel can cause Jervell and Lange-Nielsen syndrome. Hum Mol Genet 6:2179-2185
Vetter DE, Mann JR, Wangemann P, Liu JZ, McLaughlin KJ, Lesage F, Marcus DC, Lazdunski M, Heinemann SF, Barhanin J (1996) Inner ear defects induced by null mutation of the IsK gene. Neuron 17:1251-1264
Vincent G, Timothy K, Leppert M, Keating M (1992) The spectrum of symptoms and QT intervals in carriers of the gene for long QT syndrome. N Engl J Med 327:846-852
Wang Q, Chen Q, Li H, Towbin JA (1997) Molecular genetics of long QT syndrome from genes to patients. Curr Opin Cardiol 12:310-320
Wang Q, Curran ME, Splawski I, Burn TC, Millholland JM, Vanraay TJ, Shen J, Timothy KW, Vincent GM, Dejager T, Schwartz PJ, Towbin JA, Moss AJ, Atkinson DL, Landes GM, Connors TD, Keating MT (1996) Positional cloning of a novel potassium channel gene: KVLQT1 mutations cause cardiac arrhythmias. Nature Genet 12:17-23
Wang Q, Shen JX, Splawski I, Atkinson D, Li ZZ, Robinson JL, Moss AJ, Towbin JA, Keating MT (1995) SCN5 A mutations associated with an inherited cardiac arrhythmia, long QT syndrome. Cell 80:805-811
Ward OC (1964) A new familial cardiac syndrome in children. J Irish Med Assoc 54:103-106
Warmke JW, Ganetzky B (1994) A family of potassium channel genes related to eag in drosophila and mammals. Proc Natl Acad Sci USA 91:3438-3442
Wollnik B, Schroeder BC, Kubisch C, Esperer HD, Wieacker P, Jentsch TJ (1997) Pathophysiological mechanisms of dominant and recessive KVLQT1 K' channel mutations found in inherited cardiac arrhythmias. Hum Mol Genet 6:1943-1949
Woosley RL, Chen YW, Freiman JP, Gillis RA (1993) Mechanism of the cardiotoxic actions of terfenadine. JAMA 269:1532-1536
Yang T, Kupershmidt S, Roden DM (1995) Anti-minK antisense decreases the amplitude of the rapidly activating cardiac delayed rectifier K' current. Circ Res 77:1246-1253
Zeng J, Rudy Y (1995a) Early afterdepolarizations in cardiac myocytes: mechanism and rate dependence. Biophys J 68:949-964
Zeng JL, Laurita KR, Rosenbaum DS, Rudy Y (1995b) Two components of the delayed rectifier K' current in ventricular myocytes of the guinea pig type — theoretical formation and their role in repolarization. Circ Res 77:140-152
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Drici, MD., Barhanin, J. (2000). Cardiac K+ Channels and Inherited Long QT Syndrome. In: Endo, M., Kurachi, Y., Mishina, M. (eds) Pharmacology of Ionic Channel Function: Activators and Inhibitors. Handbook of Experimental Pharmacology, vol 147. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-57083-4_14
Download citation
DOI: https://doi.org/10.1007/978-3-642-57083-4_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-63030-9
Online ISBN: 978-3-642-57083-4
eBook Packages: Springer Book Archive