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Non-atherosclerotic coronary artery disease and sudden death in the young
Insights
Non-atherosclerotic coronary artery disease, particularly congenital anomalies, is a significant cause of sudden cardiac death in young individuals. These conditions often present without typical ischemic symptoms, highlighting the need for careful evaluation.
Area of Science:
- Cardiology
- Pathology
- Forensic Medicine
Background:
- Sudden cardiac death (SCD) in young individuals (< or = 35 years) often necessitates thorough investigation into underlying causes.
- Non-atherosclerotic coronary artery disease (NACAD) is an underrecognized contributor to SCD in this demographic.
Purpose of the Study:
- To determine the prevalence and types of NACAD in young individuals who experienced sudden death.
- To identify specific patterns of NACAD that may be associated with SCD in the young.
Main Methods:
- A necropsy study was conducted on 150 consecutive cases of sudden death.
- Cases were analyzed for the presence and nature of coronary artery disease, focusing on non-atherosclerotic etiologies.
Main Results:
- Coronary artery disease (CAD) was implicated in 48 deaths; 16 (33%) were non-atherosclerotic.
- Congenital coronary artery anomalies (e.g., intramyocardial course, abnormal origin, ostial stenosis) were found in 12 cases.
- Acquired NACAD, including spontaneous coronary dissection and Kawasaki disease, was identified in 4 cases.
Conclusions:
- One-third of fatal CAD cases in young sudden deaths were non-atherosclerotic, with anomalies being most common.
- Coronary artery anomalies should be suspected in young patients with ventricular arrhythmias, even without overt ischemic signs.
Objective:
To assess prevalence and type of non-atherosclerotic coronary artery disease in young people (< or = 35 years) who died suddenly.
Design:
A necropsy study of 150 consecutive cases of sudden death (that is, within 6 h of the onset of symptoms).
Results:
Death was attributed to coronary artery disease in 48 cases: in 16 (33%) of them the disease was non-atherosclerotic. Twelve subjects (eight males and four females, age range 2-35 years, mean 24.2) had congenital anomalies: a deep intramyocardial course in six, origin from the wrong sinus in three, and ostial obstructions in three. Sudden death was the first manifestation of disease in six cases. The other six had a history of palpitation or syncope or both. An electrocardiogram was available in five cases and showed ventricular arrhythmias in four; none had angina pectoris. Stress testing was available in two cases: neither showed any effort-dependent ST-T abnormalities. In six cases sudden death was related to physical exercise. Acquired non-atherosclerotic coronary artery disease was found in four cases: spontaneous coronary dissection in three previously symptom free patients and Kawasaki coronary arteritis in one child who had had acute myocardial infarction.
Conclusion:
One third of the cases of fatal coronary artery disease were non-atherosclerotic with coronary artery anomalies being the most frequent form. Coronary artery anomalies should be suspected in young patients who have symptoms of ventricular arrhythmias without any overt signs and symptoms of ischaemia.