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Unexpected death after reconstructive surgery for hypoplastic left heart syndrome
W T Mahle1, T L Spray, J W Gaynor
1Division of Cardiology, The Cardiac Center at the Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, 19104, USA. mahle@email.chop.edu
The Annals of Thoracic Surgery
|February 24, 2001
Summary
Unexpected death after hypoplastic left heart syndrome surgery is a concern, occurring in over 4% of infants post-discharge. Risk factors include perioperative arrhythmias and earlier surgical timing, highlighting the need for vigilant monitoring.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Neonatal Intensive Care
Background:
- Operative mortality for hypoplastic left heart syndrome (HLHS) surgery is decreasing.
- Nonoperative mortality, particularly within the first year of life, remains a significant concern.
- Unexpected deaths occur in clinically well infants after hospital discharge.
Purpose of the Study:
- To determine the incidence of unexpected death in HLHS patients post-discharge.
- To identify risk factors associated with unexpected death in HLHS patients.
Main Methods:
- Retrospective analysis of 536 HLHS patients discharged after stage I surgery.
- Nested case-control analysis to identify risk factors.
Main Results:
- Unexpected death occurred in 4.1% of discharged HLHS patients (22/536).
- Median age at death was 79 days; documented perioperative arrhythmia and earlier stage I surgery were risk factors.
- Autopsies revealed potential contributing residual lesions in 2 cases; neurologic events were noted in others.
Conclusions:
- Unexpected death is a significant risk (over 4%) for HLHS patients post-stage I surgery, primarily in early infancy.
- Potential contributing factors include residual lesions, arrhythmias, and neurologic events.
- The exact cause of unexpected death remains unknown in most cases.