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Akhtar MM, Lorenzini M, Cicerchia M, Ochoa JP, Hey TM, Sabater Molina M, Restrepo-Cordoba MA, Dal Ferro M, Stolfo D, Johnson R, Larrañaga-Moreira JM, Robles-Mezcua A, Rodriguez-Palomares JF, Casas G, Peña-Peña ML, Lopes LR, Gallego-Delgado M, Franaszczyk M, Laucey G, Rangel-Sousa D, Basurte M, Palomino-Doza J, Villacorta E, Bilinska Z, Limeres Freire J, Garcia Pinilla JM, Barriales-Villa R, Fatkin D, Sinagra G, Garcia-Pavia P, Gimeno JR, Mogensen J, Monserrat L, Elliott PM. Clinical Phenotypes and Prognosis of Dilated Cardiomyopathy Caused by Truncating Variants in the TTN Gene. Circ Heart Fail 2020; 13:e006832. [PMID: 32964742 DOI: 10.1161/circheartfailure.119.006832] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Truncating variants in the TTN gene (TTNtv) are the commonest cause of heritable dilated cardiomyopathy. This study aimed to study the phenotypes and outcomes of TTNtv carriers. METHODS Five hundred thirty-seven individuals (61% men; 317 probands) with TTNtv were recruited in 14 centers (372 [69%] with baseline left ventricular systolic dysfunction [LVSD]). Baseline and longitudinal clinical data were obtained. The primary end point was a composite of malignant ventricular arrhythmia and end-stage heart failure. The secondary end point was left ventricular reverse remodeling (left ventricular ejection fraction increase by ≥10% or normalization to ≥50%). RESULTS Median follow-up was 49 (18-105) months. Men developed LVSD more frequently and earlier than women (45±14 versus 49±16 years, respectively; P=0.04). By final evaluation, 31%, 45%, and 56% had atrial fibrillation, frequent ventricular ectopy, and nonsustained ventricular tachycardia, respectively. Seventy-six (14.2%) individuals reached the primary end point (52 [68%] end-stage heart failure events, 24 [32%] malignant ventricular arrhythmia events). Malignant ventricular arrhythmia end points most commonly occurred in patients with severe LVSD. Male sex (hazard ratio, 1.89 [95% CI, 1.04-3.44]; P=0.04) and left ventricular ejection fraction (per 10% decrement from left ventricular ejection fraction, 50%; hazard ratio, 1.63 [95% CI, 1.30-2.04]; P<0.001) were independent predictors of the primary end point. Two hundred seven of 300 (69%) patients with LVSD had evidence of left ventricular reverse remodeling. In a subgroup of 29 of 74 (39%) patients with initial left ventricular reverse remodeling, there was a subsequent left ventricular ejection fraction decrement. TTNtv location was not associated with statistically significant differences in baseline clinical characteristics, left ventricular reverse remodeling, or outcomes on multivariable analysis (P=0.07). CONCLUSIONS TTNtv is characterized by frequent arrhythmia, but malignant ventricular arrhythmias are most commonly associated with severe LVSD. Male sex and LVSD are independent predictors of outcomes. Mutation location does not impact clinical phenotype or outcomes.
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Affiliation(s)
- Mohammed Majid Akhtar
- Department of Inherited Cardiovascular Diseases, Bart's Heart Centre, St. Bartholomew's Hospital, London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.)
| | - Massimiliano Lorenzini
- Department of Inherited Cardiovascular Diseases, Bart's Heart Centre, St. Bartholomew's Hospital, London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.)
| | - Marcos Cicerchia
- Health in Code S.L. Scientific Department, A Coruña, Spain (M.C., J.P.O., L.M.).,Instituto de Investigación Biomédica de A Coruña, Complexo Hospitalario Universitario de A Coruña, Sergas, Universidade da Coruña, Spain (M.C., J.P.O., L.M.)
| | - Juan Pablo Ochoa
- Health in Code S.L. Scientific Department, A Coruña, Spain (M.C., J.P.O., L.M.).,Instituto de Investigación Biomédica de A Coruña, Complexo Hospitalario Universitario de A Coruña, Sergas, Universidade da Coruña, Spain (M.C., J.P.O., L.M.)
| | - Thomas Morris Hey
- Department of Cardiology, Odense University Hospital, Denmark (T.M.H., J.M.).,Odense Patient Data Explorative Network, University of Southern Denmark (T.M.H., J.M.)
| | - Maria Sabater Molina
- Inherited Cardiac Disease Unit, Hospital Universitario Virgen Arrixaca, Murcia, Spain (M.S.M., J.R.G.)
| | - Maria Alejandra Restrepo-Cordoba
- Heart Failure and Inherited Cardiac Diseases Unit, Department of Cardiology, Hospital Universitario Puerta de Hierro, Centro de Investigación en Red en Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain (M.A.R.-C., P.G.-P.).,Universidad Francisco de Vitoria, Pozuelo de Alarcon, Spain (M.A.R.-C., P.G.-P.)
| | - Matteo Dal Ferro
- Cardiovascular Department, Azienda Sanitaria Universitaria Integrata of Trieste, Trieste Hospital, Italy (M.D.F., D.S., G.S.)
| | - Davide Stolfo
- Cardiovascular Department, Azienda Sanitaria Universitaria Integrata of Trieste, Trieste Hospital, Italy (M.D.F., D.S., G.S.)
| | - Renee Johnson
- Molecular Cardiology and Biophysics Division (R.J.), Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia
| | - José M Larrañaga-Moreira
- Unidad de Cardiopatías Familiares/Cardiology Service, CIBERCV, Instituto de Investigación Biomédica de A Coruña, Complexo Hospitalario Universitario de A Coruña, Sergas, Universidade da Coruña, Spain (J.M.L.-M., R.B.-V.)
| | - Ainhoa Robles-Mezcua
- Heart Failure and Familial Heart Diseases Unit, Cardiology Department, Hospital Universitario Virgen de la Victoria, CIBERCV, IBIMA, Malaga, Spain (A.R.-M., J.M.G.P.)
| | - Jose F Rodriguez-Palomares
- Department of Cardiology, Vall d' Hebron Institut de Recerca, Hospital Universitari Vall d' Hebron, Universitat Autònoma de Barcelona, Spain (J.F.R.-P., G.C., J.L.F.)
| | - Guillem Casas
- Department of Cardiology, Vall d' Hebron Institut de Recerca, Hospital Universitari Vall d' Hebron, Universitat Autònoma de Barcelona, Spain (J.F.R.-P., G.C., J.L.F.)
| | - Maria Luisa Peña-Peña
- Heart Failure and Heart Transplantation Unit, Virgen del Rocio University Hospital, Sevilla, Spain (M.L.P.-P., D.R.-S.)
| | - Luis Rocha Lopes
- Department of Inherited Cardiovascular Diseases, Bart's Heart Centre, St. Bartholomew's Hospital, London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.)
| | - Maria Gallego-Delgado
- Inherited Cardiovascular Disease Unit, Cardiology Department, Instituto de Investigación Biomédica de Salamanca, Complejo Asistencial Universitario de Salamanca, Spain (M.G.-D., E.V.)
| | - Maria Franaszczyk
- Department of Medical Biology (M.F.), Cardinal Stefan Wyszynski Institute of Cardiology, Warsaw, Poland
| | - Gemma Laucey
- Complejo Hospitalario de Navarra, Pamplona, Spain (G.L., M.B.)
| | - Diego Rangel-Sousa
- Heart Failure and Heart Transplantation Unit, Virgen del Rocio University Hospital, Sevilla, Spain (M.L.P.-P., D.R.-S.)
| | - Mayte Basurte
- Complejo Hospitalario de Navarra, Pamplona, Spain (G.L., M.B.)
| | - Julian Palomino-Doza
- Inherited Cardiac Disease Unit, Instituto de investigación I+12, Hospital Universitario 12 de Octubre, Madrid, Spain (J.P.-D.).,Centro de Investigación Biomedica en Red en Enfermedades Cardiovasculares, CIBERCV, Madrid, Spain (J.P.-D.)
| | - Eduardo Villacorta
- Inherited Cardiovascular Disease Unit, Cardiology Department, Instituto de Investigación Biomédica de Salamanca, Complejo Asistencial Universitario de Salamanca, Spain (M.G.-D., E.V.)
| | - Zofia Bilinska
- Unit for Screening Studies in Inherited Cardiovascular Diseases (Z.B.), Cardinal Stefan Wyszynski Institute of Cardiology, Warsaw, Poland
| | - Javier Limeres Freire
- Department of Cardiology, Vall d' Hebron Institut de Recerca, Hospital Universitari Vall d' Hebron, Universitat Autònoma de Barcelona, Spain (J.F.R.-P., G.C., J.L.F.)
| | - José M Garcia Pinilla
- Heart Failure and Familial Heart Diseases Unit, Cardiology Department, Hospital Universitario Virgen de la Victoria, CIBERCV, IBIMA, Malaga, Spain (A.R.-M., J.M.G.P.)
| | - Roberto Barriales-Villa
- Unidad de Cardiopatías Familiares/Cardiology Service, CIBERCV, Instituto de Investigación Biomédica de A Coruña, Complexo Hospitalario Universitario de A Coruña, Sergas, Universidade da Coruña, Spain (J.M.L.-M., R.B.-V.)
| | - Diane Fatkin
- Molecular Cardiology and Biophysics Division (D.F.), Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St. Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Kensington, NSW, Australia (D.F.).,Cardiology Department, St. Vincent's Hospital, Darlinghurst, NSW, Australia (D.F.)
| | - Gianfranco Sinagra
- Cardiovascular Department, Azienda Sanitaria Universitaria Integrata of Trieste, Trieste Hospital, Italy (M.D.F., D.S., G.S.)
| | - Pablo Garcia-Pavia
- Heart Failure and Inherited Cardiac Diseases Unit, Department of Cardiology, Hospital Universitario Puerta de Hierro, Centro de Investigación en Red en Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain (M.A.R.-C., P.G.-P.).,Universidad Francisco de Vitoria, Pozuelo de Alarcon, Spain (M.A.R.-C., P.G.-P.)
| | - Juan R Gimeno
- Inherited Cardiac Disease Unit, Hospital Universitario Virgen Arrixaca, Murcia, Spain (M.S.M., J.R.G.)
| | - Jens Mogensen
- Department of Cardiology, Odense University Hospital, Denmark (T.M.H., J.M.).,Odense Patient Data Explorative Network, University of Southern Denmark (T.M.H., J.M.)
| | - Lorenzo Monserrat
- Health in Code S.L. Scientific Department, A Coruña, Spain (M.C., J.P.O., L.M.).,Instituto de Investigación Biomédica de A Coruña, Complexo Hospitalario Universitario de A Coruña, Sergas, Universidade da Coruña, Spain (M.C., J.P.O., L.M.)
| | - Perry M Elliott
- Department of Inherited Cardiovascular Diseases, Bart's Heart Centre, St. Bartholomew's Hospital, London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.).,Institute of Cardiovascular Science, University College London, United Kingdom (M.M.A., M.L., L.R.L., P.M.E.)
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