Heart failure & cardiomyopathies

Association of Histologic Findings With Long-Term Outcomes in Symptomatic Obstructive Hypertrophic Cardiomyopathy Patients Undergoing Surgical Myectomy

JACC Heart FailPublished Retrospective cohort study

Main findingResult — go to the resultHazard ratio 1.24 95% CI 1.03–1.54

Authors' conclusion

In symptomatic oHCM patients undergoing SM, a higher histologic score was independently associated with long-term outcomes.

Study context

Population
Symptomatic obstructive HCM patients undergoing surgical myectomy at a tertiary center, 2005–2018
Participants
1,722 patients
Exposure
Histology score >5 vs ≤5
  • Score >5n = 598
  • Score ≤5n = 1,124reference
Outcome
Composite of:
  • Death
  • Appropriate defibrillator discharge
  • Cardiac transplantation
Follow-up
During (5.1 ± 5.2 years)
Methodological detailssingle-centre
  • Single-centre

Main finding

As reported in the abstract

5.1 ± 5.2 years

Hazard ratio

1.24

95% CI 1.03–1.54

P = 0.03

Events by group

Score >5vs Score ≤5
HR 1.24 (95% CI 1.03–1.54); P = 0.03

Observational data: associations, not effects.

Further findings

Overall primary events and deaths · 5.1 ± 5.2 years

Primary events
352 (20%)
Deaths
317 [18%]
Mean total histologic score
5.1 ± 1.4

Original publication

Association of Histologic Findings With Long-Term Outcomes in Symptomatic Obstructive Hypertrophic Cardiomyopathy Patients Undergoing Surgical Myectomy. JACC Heart Fail. Published 15 November 2024. doi:10.1016/j.jchf.2024.10.006

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