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Congenital heart disease and sudden death in the young
C Basso1, C Frescura, D Corrado
1Department of Pathology, University of Padua Medical School, Italy.
Insights
Congenital heart disease contributes to one-third of sudden cardiac deaths in young individuals. Many of these underlying structural defects, often not considered life-threatening, are detectable with imaging.
Area of Science:
- Cardiology
- Pathology
- Genetics
Background:
- Sudden death is a significant cause of mortality in cardiac patients, affecting individuals of all ages.
- The role of congenital heart disease (CHD) as an underlying cause of sudden cardiac death (SCD) in young individuals requires further elucidation.
Purpose of the Study:
- To determine the prevalence and extent to which congenital heart disease contributes to sudden cardiac death in young individuals (≤35 years).
Main Methods:
- Postmortem examination of 182 young individuals who died of sudden cardiac death.
- Detailed analysis of cardiac pathology, including congenital heart defects, coronary artery anomalies, and conduction system abnormalities.
Main Results:
- Congenital heart disease was identified in 58 (32%) of the young individuals who experienced sudden cardiac death.
- Specific CHD identified included aortic dissection (associated with Marfan syndrome, bicuspid aortic valve), conduction system anomalies (bypass tracts), coronary artery anomalies, hypertrophic cardiomyopathy, and postoperative CHD.
Conclusions:
- Approximately one-third of sudden cardiac deaths in young people are attributable to congenital heart disease.
- A broad spectrum of CHD poses a risk for SCD, including conditions not typically deemed life-threatening.
- Early detection of these concealed defects through clinical imaging may be crucial for prevention.
Abstract:
Sudden death is a frequent mode of fatal outcome in cardiac disease and does not exclude young people. The aim of this investigation was to establish whether and to what extent sudden death in the young may be ascribable to the substrate of underlying congenital heart disease. Among 182 young people (< or = 35 years) who died of cardiac sudden death and underwent postmortem examination, 58 (32%) had congenital heart disease. Seven showed an intrapericardial rupture of aortic dissection, in the setting of Marfan syndrome in two, isolated bicuspid aortic valve in two, and bicuspid aortic valve and isthmic coarctation in three; all exhibited equally severe degeneration of the aortic wall. Sixteen cases had conduction system anomalies, mostly bypass tracts; 15 coronary artery anomalies (three ostial valve-like stenosis, five origin from the wrong aortic sinus, and seven deep intramyocardial course); 12 hypertrophic cardiomyopathy; five postoperative congenital heart disease including scar following ventriculotomy, conduction system injury, and defects left unrepaired; and three congenital aortic valve stenosis. One third of sudden deaths in the young was ascribable to structural defects present since birth. A large spectrum of congenital heart disease involves the risk of sudden death, but most structural defects are usually not considered to be life threatening. Some of these concealed defects are potentially detectable in life by clinical imaging techniques.