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Updated: May 25, 2025
Implantation of Total Artificial Heart in Congenital Heart Disease
Published on: July 18, 2014
Risk of late sudden death after surgery for congenital heart disease
Joseph S Needleman1,2, Robert D Whitehill1,2, J'Neka S Claxton2
1Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA.
Insights
Patients with congenital heart disease (CHD) face increased sudden cardiac death risk after surgery. Long-term monitoring is crucial for all CHD patients, even those with mild conditions, to mitigate this risk.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Cardiac Surgery
Background:
- Sudden cardiac death (SCD) is a critical concern for patients with congenital heart disease (CHD).
- Assessing the long-term risk of SCD following congenital heart surgery is essential for patient management.
Purpose of the Study:
- To evaluate the incidence and risk factors of sudden cardiac death in patients after congenital heart surgery.
- To compare SCD risk in CHD patients to the general population.
Main Methods:
- Utilized the Pediatric Cardiac Care Consortium registry (1982-2003) linked to National Death Index data (through 2019).
- Defined SCD by cardiac arrest or ventricular fibrillation codes.
- Calculated standardized mortality ratios (SMRs) against general population data.
Main Results:
- Among 30,566 patients, 463 (17%) experienced SCD over a median of 23 years.
- SCD incidence varied by CHD type, from 2.7 (left-to-right shunts) to 37 (single-ventricle physiology) per 10,000 person-years.
- SMRs for SCD were elevated across all CHD types, ranging from 8.0 to 107.7.
Conclusions:
- Sudden cardiac death risk is significantly higher in patients post-congenital heart surgery compared to the general population.
- All patients with CHD, including those with mild forms, are at risk and require long-term follow-up.
- High prevalence of heart failure and arrhythmias in SCD patients suggests potential therapeutic targets.
Background:
Sudden cardiac death is a significant concern among patients with congenital heart disease (CHD). We assessed the risk of remote sudden cardiac death after congenital heart surgery.
Methods:
Patients undergoing congenital heart surgery before 21 years of age between 1982 and 2003 in the Pediatric Cardiac Care Consortium registry were linked to National Death Index data through 2019. Sudden cardiac death was defined as death associated with a cardiac arrest or ventricular fibrillation diagnosis code. Standardised mortality ratios relative to the general population were calculated using Centers for Disease Control and Prevention data.
Results:
Among 30,566 patients discharged after their initial surgery, 2,718 deaths occurred over a median period of 23 years (IQR 19-27). Of 463 (17%) sudden cardiac deaths, the median age was 1.7 years (IQR 0.5-16.5). The mean incidence was 7 per 10,000 person-years (95% CI: 0.64-0.77), ranging from 2.7 for left-to-right shunt lesions to 37 for single-ventricle physiology. Cardiac comorbidities including heart failure (13.6%) and arrhythmias (7.1%) were more frequent among sudden cardiac death patients. Standard mortality ratios for sudden cardiac death were elevated across all CHD types, ranging from 8.0 (95% CI: 6.3-9.6) for left-to-right shunts to 107.7 (95% CI: 88.9-126.5) for single-ventricle physiology.
Conclusion:
Sudden cardiac death risk is higher post-congenital heart surgery compared to the general population. Even patients with mild CHD are at risk, highlighting the need for long-term follow-up for all patients. Heart failure and arrhythmia prevalence suggest potential therapeutic targets to reduce sudden cardiac death risk.
