Re-evaluating the incidence and prevalence of clinical hypertrophic cardiomyopathy: An epidemiological study of Olmsted County, Minnesota

Authors

Shahid Karim, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA; William Harvey Research Institute, NIHR Barts Biomedical Centre, Queen Mary University London, UK.
C Anwar Chahal, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA; William Harvey Research Institute, NIHR Barts Biomedical Centre, Queen Mary University London, UK; University of Pennsylvania, Pennsylvania, USA; Center for Inherited Cardiovascular Disease, WellSpan Health, Lancaster, PA, USA.
Akil A. Sherif, Department of Medicine, Saint Vincent Hospital, Worcester, MA, USA.
Mohammed Y. Khanji, William Harvey Research Institute, NIHR Barts Biomedical Centre, Queen Mary University London, UK; Barts Heart Centre, St Bartholomew's Hospital, London, UK; Newham University Hospital, Barts Health NHS Trust, London, UK.
Christopher G. Scott, Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA.
Alanna M. Chamberlain, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA; Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA.
Jeffrey B. Geske, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
Steve R. Ommen, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
Bernard J. Gersh, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
Virend K. Somers, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
Peter A. Brady, Advocate Health - MidwestFollow
Grace Lin, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA. Electronic address: Lin.Grace@mayo.edu.

Recommended Citation

Karim S, Chahal CAA, Sherif AA, et al. Re-evaluating the Incidence and Prevalence of Clinical Hypertrophic Cardiomyopathy: An Epidemiological Study of Olmsted County, Minnesota. Mayo Clin Proc. 2024;99(3):362-374. doi:10.1016/j.mayocp.2023.09.009

Affiliations

Advocate Illinois Masonic Medical Center

Abstract

Objective:To contemporaneously reappraise the incidence-rate, prevalence, and natural history of hypertrophic cardiomyopathy (HCM) in Olmsted County, Minnesota, from 1984 to 2015.

Patients and methods:A validated medical-record linkage system collecting information for residents of Olmsted County was used to identify all cases of HCM between January 1, 1984, and December 31, 2015. After adjudication of records from Mayo Clinic and Olmsted Medical Center, data relating to diagnoses and outcomes were abstracted. The calculated incidence rate and prevalence were standardized to the US 1980 White population (age- and sex-adjusted) and compared with a prior study examining the years 1975-1984.

Results:Two hundred seventy subjects with HCM were identified. The age- and sex-adjusted incidence rate was 6.6 per 100,000 person-years, and the point prevalence of HCM on January 1, 2016, was 89 per 100,000 population. The incidence rate and point prevalence of HCM on January 1, 2016, standardized to the US 1980 White population (age- and sex-adjusted), were 6.7 (95% CI, 7.1 to 8.8) per 100,000 person-years and 81.5 per 100,000 population, respectively. The incidence rate of HCM increased each decade since the index study. Individuals with HCM had a higher overall standardized mortality rate than the general population with an observed to expected HR of 1.44 (95% CI, 1.21 to 1.71; P

Conclusion:The incidence and prevalence of HCM are higher than rates reported from a prior study in the same community examining the years 1975-1984, but lower than other study cohorts. The risk of mortality in HCM remains higher than expected, albeit with improvement in rates of mortality observed each decade during the study period.

Type

Article

PubMed ID

38323940