Neuroanesthesia & neurocritical care

Adverse outcomes after surgery after a cerebrovascular accident or acute coronary syndrome: a retrospective observational cohort study

Br J AnaesthPublished Retrospective cohort study

Main finding · CVA, ACS and AMI after elective surgeryResult — go to the resultAdjusted hazard ratio 2.12 95% CI 2.08–2.16

Authors' conclusion

These observational data suggest increased adverse outcomes after a recent cardiovascular event can occur for up to 37 months after a major cardiovascular event.

Study context

Population
Adults undergoing noncardiac, non-neurologic surgery in NHS England, 2007–2018
Participants
877,430 vs 20,582,717
Exposure
Prior cardiovascular event vs no event
  • Previous cardiovascular eventn = 877,430
  • Without an eventn = 20,582,717reference
Outcome
ACS, AMI or cerebrovascular accident (CVA) within 1 year of surgery (main exposure: time interval between preoperative cardiovascular event and surgery)
Follow-up
1 year
Methodological detailslongitudinal, population-based, linked national data, Linked Hospital Episode Statistics (NHS England) and Myocardial Ischaemia National Audit Project data; multivariable logistic regression with restricted cubic splines, adjusted for age, sex, socioeconomic deprivation and comorbidities
  • Longitudinal
  • Population-based
  • Linked national data
  • Linked Hospital Episode Statistics (NHS England) and Myocardial Ischaemia National Audit Project data; multivariable logistic regression with restricted cubic splines, adjusted for age, sex, socioeconomic deprivation and comorbidities

Main finding

CVA, ACS and AMI after elective surgery

Adjusted hazard ratio

2.12

95% CI 2.08–2.16

Prior cardiovascular event vs Without an event
aHR 2.12 (95% CI 2.08–2.16)

As reported in the abstract

Observational data: associations, not effects.

Further findings

OutcomeaOR (95% CI)
Prolonged hospital stay (major operations)Prior cardiovascular event vs Without an event1.36 (1.35–1.38)
Unplanned readmission (major operations) · 30 daysPrior cardiovascular event vs Without an event1.28 (1.25–1.30)
Unplanned readmission (major operations) · 1 yrPrior cardiovascular event vs Without an event1.60 (1.58–1.62)

Original publication

Adverse outcomes after surgery after a cerebrovascular accident or acute coronary syndrome: a retrospective observational cohort study. Br J Anaesth. Published 9 October 2024. doi:10.1016/j.bja.2024.08.029

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