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Norrish G, Cleary A, Field E, Cervi E, Boleti O, Ziółkowska L, Olivotto I, Khraiche D, Limongelli G, Anastasakis A, Weintraub R, Biagini E, Ragni L, Prendiville T, Duignan S, McLeod K, Ilina M, Fernandez A, Marrone C, Bökenkamp R, Baban A, Kubus P, Daubeney PE, Sarquella-Brugada G, Cesar S, Klaassen S, Ojala TH, Bhole V, Medrano C, Uzun O, Brown E, Gran F, Sinagra G, Castro FJ, Stuart G, Yamazawa H, Barriales-Villa R, Garcia-Guereta L, Adwani S, Linter K, Bharucha T, Gonzales-Lopez E, Siles A, Rasmussen TB, Calcagnino M, Jones CB, De Wilde H, Kubo T, Felice T, Popoiu A, Mogensen J, Mathur S, Centeno F, Reinhardt Z, Schouvey S, Elliott PM, Kaski JP. Clinical Features and Natural History of Preadolescent Nonsyndromic Hypertrophic Cardiomyopathy. J Am Coll Cardiol 2022; 79:1986-1997. [PMID: 35589160 PMCID: PMC9125690 DOI: 10.1016/j.jacc.2022.03.347] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/02/2022] [Accepted: 03/07/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Up to one-half of childhood sarcomeric hypertrophic cardiomyopathy (HCM) presents before the age of 12 years, but this patient group has not been systematically characterized. OBJECTIVES The aim of this study was to describe the clinical presentation and natural history of patients presenting with nonsyndromic HCM before the age of 12 years. METHODS Data from the International Paediatric Hypertrophic Cardiomyopathy Consortium on 639 children diagnosed with HCM younger than 12 years were collected and compared with those from 568 children diagnosed between 12 and 16 years. RESULTS At baseline, 339 patients (53.6%) had family histories of HCM, 132 (20.9%) had heart failure symptoms, and 250 (39.2%) were prescribed cardiac medications. The median maximal left ventricular wall thickness z-score was 8.7 (IQR: 5.3-14.4), and 145 patients (27.2%) had left ventricular outflow tract obstruction. Over a median follow-up period of 5.6 years (IQR: 2.3-10.0 years), 42 patients (6.6%) died, 21 (3.3%) underwent cardiac transplantation, and 69 (10.8%) had life-threatening arrhythmic events. Compared with those presenting after 12 years, a higher proportion of younger patients underwent myectomy (10.5% vs 7.2%; P = 0.045), but fewer received primary prevention implantable cardioverter-defibrillators (18.9% vs 30.1%; P = 0.041). The incidence of mortality or life-threatening arrhythmic events did not differ, but events occurred at a younger age. CONCLUSIONS Early-onset childhood HCM is associated with a comparable symptom burden and cardiac phenotype as in patients presenting later in childhood. Long-term outcomes including mortality did not differ by age of presentation, but patients presenting at younger than 12 years experienced adverse events at younger ages.
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Affiliation(s)
- Gabrielle Norrish
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, United Kingdom,Institute of Cardiovascular Sciences, University College London, London, United Kingdom
| | - Aoife Cleary
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, United Kingdom
| | - Ella Field
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, United Kingdom
| | - Elena Cervi
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, United Kingdom
| | - Olga Boleti
- Institute of Cardiovascular Sciences, University College London, London, United Kingdom
| | | | | | | | - Giuseppe Limongelli
- Inherited and Rare Cardiovascular Disease Unit, AO dei Colli Monaldi Hospital, Universita della Campania “Luigi Vanvitelli,” Naples, Italy
| | | | | | - Elena Biagini
- Cardiology Unit, St Orsola Hospital, IRCCS Azienda Ospedalierao–Universitaria di Bologna, Bologna, Italy
| | - Luca Ragni
- Cardiology Unit, St Orsola Hospital, IRCCS Azienda Ospedalierao–Universitaria di Bologna, Bologna, Italy
| | | | | | - Karen McLeod
- Royal Hospital for Children, Glasgow, United Kingdom
| | - Maria Ilina
- Royal Hospital for Children, Glasgow, United Kingdom
| | | | - Chiara Marrone
- Papa Giovanni XXIII Hospital, Bergamo, Italy,Fondazione Toscana G. Monasterio, Massa-Pisa, Italy
| | | | | | - Peter Kubus
- University Hospital Motol, Prague, Czech Republic
| | | | | | | | - Sabine Klaassen
- Department of Pediatric Cardiology, Charite–Universitatsmedizin Berlin, Berlin, Germany,Experimental and Clinical Research Center, a joint cooperation between the Charité Medical Faculty and the Max-Delbrück-Center for Molecular Medicine, Charite–Universitatsmedizin Berlin, Berlin, Germany,DZHK (German Center for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Tiina H. Ojala
- Department of Pediatric Cardiology, Pediatric Research Center, New Children’s Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Vinay Bhole
- Birmingham Children’s Hospital, Birmingham, United Kingdom
| | | | - Orhan Uzun
- University Hospital of Wales, Cardiff, United Kingdom
| | | | - Ferran Gran
- Vall d’Hebron University Hospital, Barcelona, Spain
| | | | | | - Graham Stuart
- Bristol Royal Hospital for Children, Bristol, United Kingdom
| | - Hirokuni Yamazawa
- Department of Pediatrics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Hospital, Sapporo, Japan
| | | | | | | | | | - Tara Bharucha
- Southampton General Hospital, Southampton, United Kingdom
| | | | - Ana Siles
- Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | | | - Margherita Calcagnino
- Fondazione IRCCS Ca Granda – Ospedale Maggiore Policlinico Milano, Department di Medicina Interna – UOC Cardiologica, Milan, Italy
| | | | | | - Toru Kubo
- Kochi Medical School Hospital, Kochi, Japan
| | | | - Anca Popoiu
- University of Medicine and Pharmacy “Victor Babes” Timisoara, Department of Pediatrics, Children’s Hospital “Louis Turcanu,” Timisoara, Romania
| | | | | | | | | | | | - Perry M. Elliott
- Institute of Cardiovascular Sciences, University College London, London, United Kingdom,St Bartholomew’s Centre for Inherited Cardiovascular Diseases, St Bartholomew’s Hospital, West Smithfield, London, United Kingdom
| | - Juan Pablo Kaski
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, United Kingdom; Institute of Cardiovascular Sciences, University College London, London, United Kingdom.
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