April 1, 1994Cardiovascular Surgery
Reoperative Cardiac Valve Surgery: A Multivariable Analysis of Risk Factors
Key result
Emergency prosthetic valve reoperation linked to ~38% hospital mortality, with longer bypass times also predicting death.
- n=41
Why the study?
Risk factors for hospital mortality after reoperative cardiac valve surgery were not fully characterized.
Population
41 patients undergoing reoperation on prosthetic heart valves from 1650 cardiac valve procedures between 1983 and 1992
Comparison
Urgent-emergency versus elective reoperation status and associated versus isolated procedures
Design
Cohort study with multivariable analysis of risk factors
Follow-up
Hospital stay
Authors
Discussion
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Implication
Emergency reoperation linked to higher mortality in valve reoperations; supports earlier intervention but leaves open optimal timing in prospective studies.
Key Points
- To identify preoperative and operative risk factors associated with hospital mortality in patients undergoing prosthetic heart valve reoperation.
- Retrospective cohort analysis of 41 patients undergoing reoperation on prosthetic heart valves out of 1,650 consecutive cardiac valve procedures between December 1983 and March 1992.
- Univariate and multivariable analyses evaluating clinical, hemodynamic, and surgical variables as potential predictors of in-hospital mortality.
- Hospital mortality was 12% (2/17) for mitral valve reoperations, 26% (5/19) for aortic valve reoperations, 0% (0/5) for combined double-valve reoperations, and 24% (4/17) when associated procedures were performed compared to 12% (3/24) for isolated valve procedures.
- Mortality was 7% for elective reoperations compared to 38% for emergency procedures.
- Multivariable analysis identified longer extracorporeal circulation time and urgent-emergency surgical status as independent predictors of hospital mortality.
Study Design
Type
Cohort (n=41)
Structured PICO
P
Population
41 patients who underwent reoperation on prosthetic heart valves between December 1983 and March 1992.
E
Exposure
Reoperation on prosthetic heart valves (mitral, aortic, or associated procedures).
O
Outcome
Hospital mortalityhard clinical
Main Result
Absolute Event Rate: 38% vs 7%
Longer extracorporeal circulation time and urgent-emergency status are significant predictors of hospital mortality in patients undergoing prosthetic heart valve reoperation, supporting the recommendation for reoperation before severe hemodynamic impairment occurs.
Cite This Study
Biglioli et al. (1994) conducted a cohort in Prosthetic heart valve reoperation (n=41). Emergency reoperation vs. Elective reoperation was evaluated on Hospital mortality. Emergency reoperation (38% vs 7% for elective procedures) and longer extracorporeal circulation time were identified as multivariable predictors of hospital mortality.