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Outcomes of Septal Myectomy Associated With Surgical Volume

Yantong Wang1, Michael Bailey2, Andris Ellims3

  • 1School of Medicine, Monash University, Melbourne, Vic, Australia.

Heart, Lung & Circulation
|May 23, 2025
PubMed

Insights

Higher hospital and surgeon volume in septal myectomy (SM) procedures is linked to better patient outcomes. This study emphasizes the critical role of case volume in septal myectomy success rates.

Area of Science:

  • Cardiovascular Surgery
  • Surgical Outcomes Research
  • Health Services Research

Background:

  • Previous research indicated an inverse relationship between hospital volume and septal myectomy (SM) outcomes.
  • Surgeon volume's impact on SM outcomes remained largely unassessed.

Purpose of the Study:

  • To evaluate the association between hospital volume, surgeon volume, and outcomes following septal myectomy (SM).
  • To analyze SM outcomes in Australia and New Zealand.

Main Methods:

  • Utilized data from the Australian and New Zealand Society of Cardiac and Thoracic Surgeons Database (2001-2021).
  • Categorized hospitals into low, middle, and high annual SM case volume tertiles.
  • Analyzed 30-day mortality and complication rates based on procedural volume.

Main Results:

  • A cohort of 1,132 patients and 115 surgeons was included.
  • Low-volume centers had significantly higher mortality (4.9%) compared to middle (1.3%) and high-volume centers (1.1%).
  • Surgeons with lower case volumes were associated with higher 30-day mortality rates.

Conclusions:

  • Both hospital and surgeon case volume are crucial factors influencing outcomes after septal myectomy (SM).
  • Increased procedural volume at centers and by individual surgeons correlates with improved patient safety and results.
Abstract

Keywords:
Hypertrophic cardiomyopathySeptal myectomyTreatment outcomes

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