Clinical trial NCT01623245: Prevalence of Transthyretin Amyloidosis in Hypertrophic Cardiomyopathy
Official title: Prevalence of Transthyretin Amyloidosis in Hypertrophic Cardiomyopathy
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Cardiac Amyloidosis
Amyloidosis in Transthyretin (TTR)
Hypertrophic Cardiomyopathy (HCM)
Lead sponsor: French Cardiology Society
Sponsor class: OTHER
First posted: 2012-06-19
Enrollment: 294
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: The study population is that of patients with hypertrophic cardiomyopathy in France whose origin has not yet been determined.

Brief summary: Cardiac amyloidosis are related to the accumulation of fibrillar proteins in the extracellular leading to disruption of the cardiac tissue architecture. Amyloidosis in transthyretin (TTR) are the most common hereditary amyloidosis but remain poorly studied at heart. This is serious and deadly. The prevalence of TTR amyloidosis is probably underestimated in hypertrophic cardiomyopathy (HCM) often of unknown etiology because of the lack of systematic implementation of myocardial biopsy because of their side effects.

Detailed description: A systematic screening of TTR mutations within the MHC would diagnose cardiac amyloidosis in TTR and improve the care of patients and their families.

The detection of this disease is important because this disease is fatal and a new treatment to prevent the accumulation of TTR is now available (Tafamidis). This drug has proved effective in stabilizing neurological damage.

Depending on the number of patient with cardiac amyloidosis in TTR detected, the prospect will begin a clinical trial to test the effectiveness of a new treatment to prevent the increase in mass of the left ventricle wall objectified resonance nuclear Magnetic.

Eligibility criteria: Inclusion Criteria:

* Patients with cardiomyopathy defined by an ultrasound thickness of the left ventricle \>= 13 mm if familial form or \>= 15 mm if sporadic form.
* Patients with a signed consent authorizing the specific blood test for genetic sequencing to look for abnormal TTR gene

Exclusion Criteria:

* Patients with a diagnosis of cardiomyopathy already determined or related already diagnosed.
* Significant aortic stenosis (≤ 1 cm ²)

Primary outcomes:
measure: Number of ATTRm mutations
timeFrame: 1 day
Secondary outcomes:
measure: Genotype and clinical factors
timeFrame: 1 day
Other outcomes:
Locations:
city: Creteil
country: France
facility: Henri Mondor Hospital
Study officials:
affiliation: Assistance Publique - Hôpitaux de Paris
name: Thibaud DAMY
role: PRINCIPAL_INVESTIGATOR
References:
citation: Christoph DC, Boese D, Johnson KT, Schlosser TW, Hunold P, Baba HA, Erbel R, Philipp S. Heart failure and cardiac involvement as isolated manifestation of familial form of transthyretin amyloidosis resulting from Val30Met mutation with no clinical signs of polyneuropathy. Circ Heart Fail. 2009 Sep;2(5):512-5. doi: 10.1161/CIRCHEARTFAILURE.109.853697. No abstract available.
citation: Merlini G, Bellotti V. Molecular mechanisms of amyloidosis. N Engl J Med. 2003 Aug 7;349(6):583-96. doi: 10.1056/NEJMra023144. No abstract available.
citation: Morner S, Hellman U, Suhr OB, Kazzam E, Waldenstrom A. Amyloid heart disease mimicking hypertrophic cardiomyopathy. J Intern Med. 2005 Sep;258(3):225-30. doi: 10.1111/j.1365-2796.2005.01522.x.
citation: Jacobson DR, Pastore RD, Yaghoubian R, Kane I, Gallo G, Buck FS, Buxbaum JN. Variant-sequence transthyretin (isoleucine 122) in late-onset cardiac amyloidosis in black Americans. N Engl J Med. 1997 Feb 13;336(7):466-73. doi: 10.1056/NEJM199702133360703.
citation: Plante-Bordeneuve V, Ferreira A, Lalu T, Zaros C, Lacroix C, Adams D, Said G. Diagnostic pitfalls in sporadic transthyretin familial amyloid polyneuropathy (TTR-FAP). Neurology. 2007 Aug 14;69(7):693-8. doi: 10.1212/01.wnl.0000267338.45673.f4.
citation: Plante-Bordeneuve V. [The diagnosis and management of familial amyloid polyneuropathy]. Rev Neurol (Paris). 2006 Nov;162(11):1138-46. doi: 10.1016/s0035-3787(06)75130-x. French.
citation: Rapezzi C, Merlini G, Quarta CC, Riva L, Longhi S, Leone O, Salvi F, Ciliberti P, Pastorelli F, Biagini E, Coccolo F, Cooke RM, Bacchi-Reggiani L, Sangiorgi D, Ferlini A, Cavo M, Zamagni E, Fonte ML, Palladini G, Salinaro F, Musca F, Obici L, Branzi A, Perlini S. Systemic cardiac amyloidoses: disease profiles and clinical courses of the 3 main types. Circulation. 2009 Sep 29;120(13):1203-12. doi: 10.1161/CIRCULATIONAHA.108.843334. Epub 2009 Sep 14.
citation: Said G, Plante-Bordeneuve V. Familial amyloid polyneuropathy: a clinico-pathologic study. J Neurol Sci. 2009 Sep 15;284(1-2):149-54. doi: 10.1016/j.jns.2009.05.001. Epub 2009 May 24.
citation: Saraiva MJ. Sporadic cases of hereditary systemic amyloidosis. N Engl J Med. 2002 Jun 6;346(23):1818-9. doi: 10.1056/NEJM200206063462312. No abstract available.