Norrish, G;
Hall, K;
Field, E;
Cervi, E;
Boleti, O;
Ziółkowska, L;
Olivotto, I;
... Kaski, JP; + view all
(2025)
Sex Differences in Children and Adolescents With Hypertrophic Cardiomyopathy.
JACC: Advances
, 4
(8)
, Article 101907. 10.1016/j.jacadv.2025.101907.
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Abstract
Background: Sex differences have been described in adults with hypertrophic cardiomyopathy (HCM), but it is unknown if similar differences exist in childhood-onset disease. Objectives: This study aimed to investigate the influence of biological sex on the clinical characteristics and outcomes of children with HCM. Methods: An international retrospective cohort of patients diagnosed with nonsyndromic HCM ≤16 years was formed. Sex differences in baseline characteristics and clinical outcomes were investigated. Primary outcome was all-cause mortality or cardiac transplantation. Secondary outcomes include major arrhythmic cardiac event and heart failure event. Results: Of 1,433 patients diagnosed at a median age of 11 years (IQR: 6-14), 471 (33.0%) were female. Although there were no sex differences in phenotype in preadolescent patients (<12 years), adolescent female patients were more likely to have heart failure symptoms (n = 53 [31.9%] vs n = 86 [22.5%]; P = 0.019). Adolescent female patients had larger left atrial size (1.4 z-score [±2.3] vs 2.1 z-score [±2.5]; P = 0.0056) but there was no difference in degree of hypertrophy or proportion with obstructive disease. Over a median follow-up of 5.3 years (IQR: 2.9, 8.0) annual incidence of all-cause mortality or cardiac transplantation, major arrhythmic cardiac event or heart failure events did not vary by sex. Conclusions: Young female patients with HCM are more likely to experience heart failure symptoms and have echocardiographic features of diastolic impairment. Despite differences in phenotype, outcomes during childhood and young adulthood are not different. Further studies are required to explore the underlying mechanisms for these observed differences.
| Type: | Article |
|---|---|
| Title: | Sex Differences in Children and Adolescents With Hypertrophic Cardiomyopathy |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jacadv.2025.101907 |
| Publisher version: | https://doi.org/10.1016/j.jacadv.2025.101907 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Adolescent, hypertrophic cardiomyopathy, phenotype, sex differences |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10212471 |
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