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Die isolierte Noncompaction-Kardiomyopathie unter besonderer Berücksichtigung ihrer rhythmologischen Komplikationen

Isolated noncompaction cardiomyopathy with special emphasis on arrhythmia complications

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Zusammenfassung

Die isolierte Noncompaction Kardiomyopathie (NCCM) ist eine seltene, genetisch determinierte Herzmuskelerkrankung, bei der der Remodellingprozess des linksventrikulären (LV) Myokards während der Embryonalzeit gestört ist, sodass in den betroffenen Abschnitten der LV-Wand eine schmale kompakte und eine dickere nicht kompakte Myokardschicht verbleiben. Die Genetik der NCCM ist dabei durch eine große Heterogenität charakterisiert. Die Diagnostik der NCCM kann durch Echokardiographie oder kardiale Magnetresonanztomographie erfolgen, wobei die Diagnosekriterien immer noch einer Diskussion unterliegen. Die betroffenen Patienten weisen ein breites Spektrum an Befunden und Symptomen auf: Arrhythmien, Herzinsuffizienz und kardioembolische Ereignisse. In der Risikostratifikation erwiesen sich neben der schweren LV-Funktionsstörung ein kompletter Linksschenkelblock und Vorhofflimmern als signifikante Risikomarker für schwere klinische Ereignisse. Die Therapie der NCCM erfolgt individuell und orientiert sich an den Symptomen und Untersuchungsbefunden. Sie umfasst eine medikamentöse Behandlung, im Bedarfsfall auch Ablationsbehandlungen oder gerätebasierte Therapien und bei schwerster Herzinsuffizienz eine Listung zur Herztransplantation. Bei der Betreuung von Patienten mit NCCM sollte neben der regelmäßigen kardiologischen Kontrolle auch ein Familienscreening mit Erhebung der Anamnese, körperlicher Untersuchung, EKG-Registrierung und Echokardiographie durchgeführt werden.

Abstract

Isolated noncompaction cardiomyopathy (NCCM) is a rare genetically determined myocardial disease caused by abnormal fetal development of the myocardium resulting in a thin compacted and a thicker noncompacted layer of the affected left ventricular (LV) wall. The genetic basis of NCCM is heterogenous. Diagnosis can be made using echocardiography or magnetic resonance imaging. The diagnostic criteria for NCCM are still under discussion. Afflicted patients may present with various symptoms caused by arrhythmias, heart failure and cardioembolic events. Severely reduced LV function as well as left bundle branch block and atrial fibrillation were shown to be linked to worse outcomes. Treatment in patients with NCCM should be targeted at individual symptoms and clinical findings. Therapy includes pharmacological treatment, and in individual cases ablation or device therapy, as well as consideration for heart transplantation in selected cases. Aside from regular clinical follow-up of patients with NCCM screening of first degree family members with assessment of medical history, physical examination, ECG recording, and echocardiography are recommended.

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Literatur

  1. Engberding R, Bender F (1984) Identification of a rare congenital anomaly of the myocardium by two-dimensional echocardiography: persistence of isolated myocardial sinusoids. Am J Cardiol 53:1733–1734

    Article  PubMed  CAS  Google Scholar 

  2. Richardson P, Mc Kenna W, Bristow M et al (1996) Report of the 1995 World Health Organization/International Society and Federation of Cardiology Task Force on the Definition and Classification of Cardiomyopathies. Circulation 93:841–842

    Article  PubMed  CAS  Google Scholar 

  3. Maron BJ, Towbin JA, Thiene G et al (2006) Contemporary definitions and classifications of the cardiomyopathies: an American Heart Association Scientific Statement form the Council on Clinical Cardiology, Heart Failure and Transplantation Committee: Quality of Care and Outcomes Research and Functional Genomics and Translational Biology Interdisciplinary Working Groups; and the Council on Epidemiology and Prevention. Circulation 113:1807–1816

    Article  PubMed  Google Scholar 

  4. Varnava AM (2001) Isolated left ventricular non-compaction: a distinct cardiomyopathy? Heart 6:599–600

    Article  Google Scholar 

  5. Towbin JA (2010) Left ventricular Noncompaction: A new form of heart failure. Heart Failure Clin 6:453–469

    Article  Google Scholar 

  6. Bleyl SB, Mumford BR, Brown-Harrison M-C et al (1997) Xq28-linked noncompaction of the left ventricular myocardium: prenatal diagnosis and pathologic analysis of affected individuals. Am J Med Genet 72:257–265

    Article  PubMed  CAS  Google Scholar 

  7. Stöllberger C, Finsterer J, Blazek G (2002) Left ventricular hypertrabeculation/noncompaction and association with additional cardiac abnormalities and neuromuscular disorders. Am J Cardiol 90:899–902

    Article  PubMed  Google Scholar 

  8. Andrews RE, Fenton MJ, Ridout DA, Burch M (2008) British Congenital Cardiac Association. New-onset heart failure due to heart muscle disease in childhood: a prospective study in the United Kingdom and Ireland. Circulation 117:79–84

    Article  PubMed  Google Scholar 

  9. Oechslin EN, Attenhofer Jost CH, Rojas JR, Kaufmann PA, Jenni R (2000) Long-term follow-up of 34 adults with isolated left ventricular noncompaction: a distinct cardiomyopathy with poor prognosis. J Am Coll Cardiol 36:493–500

    Article  PubMed  CAS  Google Scholar 

  10. Sandhu R, Finkelhor RS, Gunawardena DR, Bahler RC (2008) Prevalence and characteristics of left ventricular noncompaction in a community hospital cohort of patients with systolic dysfunction. Echocardiography 25:8–12

    PubMed  Google Scholar 

  11. Ali SK (2008) Unique features of non-compaction of the ventricular myocardium in Arab and African patients. Cardiovasc J Afr 19:241–245

    PubMed  Google Scholar 

  12. Espinola-Zavaleta N, Soto ME, Castellanos LM, Játiva-Chávez S, Keirns C et al (2006) Non-compacted cardiomyopathyy: clinical-echocardiographic study. Cardiovasc Ultrasound 4:35–45

    Article  PubMed  Google Scholar 

  13. Stöllberger C, Winkler-Dworak M, Blazek G, Finsterer J (2007) Prognosis of left ventricular hypertrabeculation/concompaction is dependent on cardiac and neuromuscular comorbidity. Int J Cardiol 121:189–193

    Article  PubMed  Google Scholar 

  14. Allenby PA, Gould NS, Schwartz MF, Chiemmongkoltip P (1988) Dysplastic cardiac development presenting as cardiomyopathy. Arch Pathol Lab Med 112:1255–1258

    PubMed  CAS  Google Scholar 

  15. Jenni R, Goebel N, Tartini R, Schneider J, Arbenz U, Oelz O et al (1986) Persisting myocardial sinusoids of both ventricles as an isolated anomaly: echocardiographic, angiographic, and pathologic anatomical findings. Cardiovasc Intervent Radiol 9:127–131

    Article  PubMed  CAS  Google Scholar 

  16. Ritter M, Oechslin E, Sütsch G, Attenhofer C, Schneider J, Jenni R (1997) Isolated noncompaction of the myocardium in adults. Mayo Clin Proc 72:26–31

    Article  PubMed  CAS  Google Scholar 

  17. Boyd MT, Seward JB, Tajik AJ, Edwards WD (1987) Frequency and location of prominent left ventricular trabeculations at autopsy in 474 normal human hearts: implications for evaluation of mural thrombi by two-dimensional echocardiography. J Am Coll Cardiol 9:323–326

    Article  PubMed  CAS  Google Scholar 

  18. Engberding R, Yelbuz MT, Breithardt G (2007) Isolated noncompaction of the left ventricular myocardium. A review of the literature two decades after the initial case description. Clin Res Cardiol 96:481–488

    Article  PubMed  CAS  Google Scholar 

  19. Chin TK, Perloff JK, Williams RG, Jue K, Mohrmann R (1990) Isolated noncompaction of left ventricular myocardium. A study of eight cases. Circulation 82:507–513

    Article  PubMed  CAS  Google Scholar 

  20. Junga G, Kneifel S, Von Smekal A, Steinert H, Bauersfeld U (1999) Myocardial ischaemia in children with isolated ventricular non-compaction. Eur Heart J 20:910–16

    Article  PubMed  CAS  Google Scholar 

  21. Sato Y, Matsumoto N, Matsuo S et al (2007) Myocardial perfusion abnormality and necrosis in a patient with isolated noncompaction of the ventricular myocardium: evaluation by myocardial perfusion SPECT and magnetic resonance imaging. Intern J Cardiol 120:e24-e26

    Article  Google Scholar 

  22. Jenni R, Oechslin E, Schneider J, Attenhofer J, Kaufmann PA (2001) Echocardiographic and pathoanatomical characteristics of isolated left ventricular non-compaction: a step towards classification as a distinct cardiomyopathy. Heart 86:666–671.

    Article  PubMed  CAS  Google Scholar 

  23. Soler R, Rodriguez E, Monserrat L, Alvarez N (2002) MRI of subendocardial perfusion deficits in isolated left ventricular noncompaction. J Comput Assist Tomogr 26:373–375

    Article  PubMed  Google Scholar 

  24. Callis TE, Jensen BC, Weck KE, Willis MS (2011) Evolving molecular diagnostics for familial cardiomyopathies: at the heart of it all. Expert Rev Mol Diagn 10(3):329–351

    Article  Google Scholar 

  25. Ichida F, Tsubata S, Bowles KR et al (2001) Novel gene mutations in patients with left ventricular noncompaction or Barth syndrome. Circulation 103:1256–1263

    Article  PubMed  CAS  Google Scholar 

  26. Klaassen S, Probst S, Oechslin E et al (2008) Mutations in sarcomere protein genes in left ventricular noncompaction. Circulation 117:2893–2901

    Article  PubMed  CAS  Google Scholar 

  27. Kenton AB, Sanchez X, Coveler KJ et al (2004) Isolated left ventricular noncompaction is rarely caused by mutations in G4.5, α-dystrobrevin and FK Binding Protein-12. Mol Genet Metab 82:162–166

    Article  PubMed  CAS  Google Scholar 

  28. Sasse-Klaassen S, Probst S, Gerull B et al (2004) Novel gene locus for autosomal dominant left ventricular noncompaction maps to chromosome 11p15. Circulation 109:2720–2723

    Article  PubMed  CAS  Google Scholar 

  29. Hoedemaekers YM, Caliskan K, Majoor-Krakauer D et al (2007) Cardiac β-myosin heavy chain defects in two families with non-compaction cardiomyopathy: linking non-compaction to hypertrophic, restrictive, and dilated cardiomyopathies. Eur Heart J 28:2732–2737

    Article  PubMed  CAS  Google Scholar 

  30. Dellafave L, McNally EM (2008) Sarcomere mutations in cardiomyopathy, noncompaction and the developing heart. Circulation 117:2847–2849

    Article  Google Scholar 

  31. Johnson MT, Zhang S, Gilkeson R et al (2006) Intrafamilial variability of noncompaction of the ventricular myocardium. Am Heart J 151:e7-e14

    Article  PubMed  Google Scholar 

  32. Kelley-Hedgepeth A, Towbin JA, Maron MS (2009) Overlapping phenotypes left ventricular noncompaction and hypertrophic cardiomyopathy. Circulation 119:e588-e589

    Article  PubMed  Google Scholar 

  33. Kohli SK, Pantazis AA, Shah J, Adeyemi B, Jackson G, McKenna WJ, Sharma S, Elliott PM (2008) Diagnosis of left-ventricular non-compaction in patients with left-ventricular systolic dysfunction: time for a reappraisal of diagnostic criteria? Eur Heart J 29:89–95

    Article  PubMed  Google Scholar 

  34. Murphy RT, Thaman R, Blanes JG et al (2005) Natural history and familial characteristics of isolated left ventricular non-compaction. Eur Heart J 26:187–192

    Article  PubMed  Google Scholar 

  35. Rajdev S, Singh A, Nanda NC, Baysan O, Hsiung MC (2007) Comparison of two- and three-dimensional transthoracic echocardiography in the assessment of trabeculations and trabecular mass in left ventricular noncompaction. Echocardiography 24:760–767

    Article  PubMed  Google Scholar 

  36. van Dalen BM, Caliskan K, Soliman OII, Kauer F, Van Der Zwaan HB, Vletter WB, van Vark LC, ten Cate FJ, Geleijnse ML (2011) Diagnostic value of rigid body rotation in noncompaction cardiomyopathy. J Am Soc Echocardiogr 24:548–555

    Article  PubMed  Google Scholar 

  37. Petersen SE, Selvanayagam JB, Wiesmann F, Robson MD, Francis JM, Anderson RH, Watkins H, Neubauer S (2005) Left ventricular noncompaction. Insights from cardiovascular magnetic resonance imaging. J Am Coll Cardiol 46:101–105

    Article  PubMed  Google Scholar 

  38. Kawel N, Nacif M, Arai AE, Gomes AS, Hundley WG, Johnson C, Prince MR, Stacey B, Lima JAC, Bluemke DA (2012) Trabeculated (non-compacted) and compact myocardium in adults: the multi-ethnic study of atherrosclerosis. Circ Cardiovasc Imaging 5:357–366

    Article  PubMed  Google Scholar 

  39. Jacquier A, Thuny F, Jop B, Giorgi R, Cohen F, Gaubert JY, Vidal V, Bartoli JM, Habib G, Moulin G (2010) Measurement of trabeculated left ventricular mass using cardiac magnetic resonance imaging in the diagnosis of left ventricular non-compaction. Eur Heart J 31:1098–1104

    Article  PubMed  Google Scholar 

  40. Lofiego C, Biagini E, Pasquale F, Ferlito M, Rocchi G, Perugini E, Bacchi-Reggiani L, Boriani G, Leone O, Caliskan K, ten Cate FJ, Picchio FM, Branzi A, Rappezzi C (2007) Wide spectrum of presentation and variable outcomes of isolated left ventricular non-compaction. Heart 93:65–71

    Article  PubMed  CAS  Google Scholar 

  41. Engberding R, Stöllberger C, Ong P, Yelbuz TM, Gerecke BJ, Breithardt G (2010) Non compaction Kardiomyopathie. Dtsch Arztebl Int 107(12):206–213

    PubMed  Google Scholar 

  42. Steffel J, Kobza R, Oechslin E, Jenni R, Duru F (2009) Electrocardiographic characteristics at initial diagnosis in patients with isolated left ventricular noncompaction. Am J Cardiol 104:984–989

    Article  PubMed  Google Scholar 

  43. Gerecke BJ, Stöllberger C, Schneider B, Fehske W, Engberding R (2012) Klinischer Verlauf bei Noncompaction-Kardiomyopathie: Daten des ALKK-Noncompaction-Registers. Clin Res Cardiol 101(Supp 1):V947

    Google Scholar 

  44. Caliskan K, Hoedemaekers YM, ten Cate FJ, Theuns DA, Balk AH, Jordaens L, Szili-Torok T (2009) Ventricular tachyarrhythmias and sudden cardiac death as a first sign of noncompaction cardiomyopathy. Circulation 120:S697

    Google Scholar 

  45. Fichet J, Legras A, Bernard A, Babuty D (2007) Aborted sudden cardiac death revealing isolated noncompaction of the left ventricle in a patient with Wolff-Parkinson-White Syndrome. PACE 30:444–447

    Article  PubMed  Google Scholar 

  46. Gerecke BJ, Stoellberger C, Schneider B, Fehske W, Nothnagel D, Engberding R (2011) Arrhythmias in isolated noncompaction cardiomyopathy data from the German noncompaction registry (ALKK). Circulation 124:A 11978

    Google Scholar 

  47. Enriques SG, Entem FR, Cobo M, Olalla JJ (2007) Uncommon etiology of syncope in a patient with isolated ventricular noncompaction. PACE 30:577–579

    Article  Google Scholar 

  48. Sajeev CG, Francis J, Shanker V, Vasudev B, Khader A, Venugopal K (2006) Young male with isolated noncompaction of the ventricular myocardium presenting with atrial fibrillation and complete heart block. Int J Cardiol 107:142–143

    Article  PubMed  CAS  Google Scholar 

  49. Fiala M, Januska J, Bulkova V, Pleva M (2010) Septal ventricular tachykardia with alternating LBBB-RBBB morphology in isolated ventricular noncompaction. J Cardiovasc Electrophysiol 21:704–707

    Article  PubMed  Google Scholar 

  50. Lim HE, Pak HN, Shim WJ, Ro YM, Kim YH (2006) Epicardial ablation of ventricular tachycardia associated with isolated ventricular noncompaction. PACE 29:797–799

    Article  PubMed  Google Scholar 

  51. Paparella G, Caputzini L, de Asmundis C, Francesconi A, Sarkozy A, Chierchia G, Brugada P (2009) Electro-anatomical mapping in a patient with isolated left ventricular non-compaction and left ventricular tachycardia. Europace 11:1227–1229

    Article  PubMed  Google Scholar 

  52. Finsterer J, Stöllberger C, Tymms T, Fazio G, Sieja S (2010) Shall a pilot with left ventricular hypertrabeculation/ noncompaction fly passengers? Int J Cardiol 145:72–73

    Article  PubMed  CAS  Google Scholar 

  53. Steffel J, Kobza R, Namdar M, Wolber T, Brunckhorst C, Lüscher TF, Jenni R, Duru F (2009) Electrophysiological findings in patients with isolated left ventricular non-compaction. Europace 11:1193–1200

    Article  PubMed  Google Scholar 

  54. Oechslin E, Jenni R (2011) Left ventricular non-compaction revisited: a distinct phenotype with genetic heterogeneity? Euro Heart J 32:1446–1456

    Article  Google Scholar 

  55. Gerecke, BJ, Stöllberger C, Fehske W, Schneider B, Nothnagel D, Engberding R (2011) Herzinsuffizienz bei Noncompaction Kardiomyopathie: Daten des Deutschen-Noncmpaction-Registers (ALKK). Clin Res Cardiol 100(Supp 1):P10179

    Google Scholar 

  56. Jenni R, Oechslin EN, van de Loo B (2006) Isolated ventricular non-compaction of the myocardium in adults. Heart 93:11–15

    Article  PubMed  Google Scholar 

  57. Celiker A, Kafali G, Dogan R (2004) Cardioverter defibrillator Implantation in a child with isolated noncompaction of the ventricular myocardium and ventricular fibrillation. PACE 27:104–108

    Article  PubMed  Google Scholar 

  58. Kobza R, Steffel J, Erne P, Schoenenberger AW, Hürlimann D, Lüscher TF, Jenni R, Duru F (2010) Implantable cardioverter-defibrillator and cardiac resynchronization therapy in patients with left ventricular noncompaction. Heart Rhythm 7:1545–1549

    Article  PubMed  Google Scholar 

  59. Caliskan K, Szili-Torok T, Theuns D, Kardos A, Geleijnse ML, Balk A, Domburg R, Jordaens L, Simoons ML (2011) Indications and outcome of implantatable cardioverter-defibrillators for primary and secondary prophylaxis in patients with noncompaction cardiomyopathy. J Cardiovasc Electrophysiol 22:898–904

    Article  PubMed  Google Scholar 

  60. Epstein AE, DiMarco JP, Ellenbogen KA et al (2008) ACC/AHA/HRS 2008 Guidelines for device-based therapy of cardiac rhythm abnormalities. J Am Coll Cardiol 51:e1-e62

    Article  PubMed  Google Scholar 

  61. Stanton C, Bruce C, Connolly H, Brady P, Syed I, Hodge D, Asirvatham S, Friedman P (2009) Isolated left ventricular noncompaction syndrome. Am J Cardiol 14:1135–1138

    Article  Google Scholar 

  62. Stöllberger C, Stix A, Finsterer J (2011) Overreaction to noncomapction in a patient with ankylosing spondylitis, Parkinson disease, migraine and myopathy. Int J Cardiol 150:e11–e14

    Article  PubMed  Google Scholar 

  63. Sakai Y, Sato Y, Matsuo S, Imai S, Kunimasa T, Matsumoto N, Saito S (2007) Perforation of the right ventricular free wall by an ICD lead in a patient with isolated noncompaction of the ventricular myocardium. Int J Cardiol 117:e104–e116

    Article  PubMed  Google Scholar 

  64. Bertini M, Ziacchi M, Biffi M, Biagini E, Rocchi G, Martignani C, Ferlito M, Pasquale F, Cervi E, Branzi A, Rapezzi C, Boriani G (2011) Effects of cardiac resynchronisation therapy on dilated cardiomyopathy with isolated ventricular non-compaction. Heart 97:295–300

    Article  PubMed  Google Scholar 

  65. Dickstein K, Vardas PE, Auricchio A, Daubert JC, Linde C, McMurray J, Ponikowski P, Priori SG, Sutton R (2010) 2010 Focused Update of ESC Guidelines on device therapy in heart failure: an update of the 2008 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure and the 2007 ESC guidelines for cardiac and resynchronization therapy. Developed with the special contribution of the Heart Failure Association and the European Heart Rhythm Association.. Eur Heart J 31:2677–2687

    Article  PubMed  Google Scholar 

  66. Corrado G, Fazio G, Zachara E et al (2008) Natural history of isolated noncompaction of the ventricular myocardium in adults. Data from the Società Italiana di Ecografia Cardiovascolare (SIEC) registry. Circulation 118:948

    Google Scholar 

  67. Hershberger, RE, Lindenfeld J, Mestroni L, Seidman CE, Taylor M, Towbin, JA (2009) Genetic evaluation of cadiomyopathy: a HFSA comprehensive heart failure practice guideline. J Card Fail 15:83–97

    Article  PubMed  Google Scholar 

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Appendix

Appendix

Bisher teilnehmende Zentren des Deutschen NCCM-Registers (ALKK) (in alphabetischer Reihenfolge):

Ahlen, Kuklinski; Bayerisch Gmain, G. Haug; Berlin, D. Andresen, I. Siegel; Berlin, M. Beling; Berlin, A.C. Borges; Berlin, E. Fleck, J. H. Li; Braunschweig, A. Allers; Braunschweig, F. Gradaus; Coesfeld, S. Strick; Dortmund, H. Heuer, C. Starke; Essen, T. Budde; Esslingen, H. Wankmüller, M. Leschke, Euskirchen, R. Müller-Franzes; Frankfurt, T. Krug; Frankfurt, S. Sen, C. Kadel; Frankfurt, A. Schmermund; Greifswald, S. Felix, A. Hummel; Gunzenhausen Prismeier; Hameln, H.M. Grosse; Helmstedt, S. H. Nguyen; Hildesheim, J. Tebbenjohanns, K. Rühmkorf; Idar-Oberstein, H.H. Klein, W. Toepel; Ingolstadt, C. Pfafferott, A. Schöpflin; Karlsruhe, C. Schmitt, R. Wondraschek; Kempen, S. Frickel; Kiel, Frey; Köln, W. Fehske; Köln, J. Fritsch; Köln, – M. Horlitz, E. Gorr; Kreuznach Elsner; Lindenbrunn, Dettmer-Flügge; Ludwigsburg, I. Kruck; Ludwigsburg, C. Wolpert, D. Nothnagel; Lübeck, B. Schneider; Merzig, C. Rheinert Mühlheim, Dodos; Münster, G. Breithardt, S. Zellerhoff; Oldenburg, Knöchner; Rheine, S. Middendorf; Rotenburg Wümme, H. Andresen; Rostock, Placke; Rothenburg, J. Vogelpohl; Schönebeck, M. Groß, U. Nauke, M. Jüch; Steinheim, M. Ringbeck; Stuttgart, U. Sechtem, P. Ong; Ulm, M. Lieberknecht; Wien, C. Stöllberger; Wiesbaden, Immel; Wolfsburg, R. Engberding, B. Gerecke, Worms Wess.

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Gerecke, B., Engberding, R. Die isolierte Noncompaction-Kardiomyopathie unter besonderer Berücksichtigung ihrer rhythmologischen Komplikationen. Herzschr Elektrophys 23, 201–210 (2012). https://doi.org/10.1007/s00399-012-0226-6

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